Optical module and vehicle

Abstract

The present application provides an optical module and a vehicle, including: a light source; a reflector, wherein the light source is disposed at or near the light-emitting focus of the reflector, and the imaging focus of the reflector is located between a first lens and a second lens; a first lens is disposed near the light-emitting surface of the reflector, and is used to collimate the light from the horizontal direction; a second lens is used to allow the light transmitted through the first lens to pass through and to collimate the light from the vertical direction; wherein the first lens and the second lens together form a composite focus, and the composite focus is located near the root of the reflector. In the present application, the imaging focus of the reflector is on the side of the first lens close to the second lens, which will reduce the width of the final light-emitting surface in the vertical direction, making the light emission and imaging more focused and the light emission more efficient; in this embodiment, the composite focus of the two lenses is located near the root of the reflector, and the overall length of the optical module is significantly shortened.

Description

Technical Field

[0001] The present application relates to the field of vehicle lighting technology, and in particular to an optical module and a vehicle. Background Art

[0002] With the vigorous development of the automobile market, car lights have gradually been given more decorative attributes from the initial functional components. As the most important light-emitting component in the car light assembly, the importance of the optical module in affecting the appearance of the entire lamp is self-evident.

[0003] As car lighting technology matures, higher requirements are placed on the uniformity, width and other optical properties of vehicle near and far beams. The mainstream car lighting modules on the market currently use a single-focus lens optical system, which requires lenses with larger upper and lower openings. In order to make the light more concentrated, the mainstream shape is now more and more close to Figure 1 The lens 2' shown has narrow upper and lower openings. However, after the light emitted by the light source 3' crosses the upper and lower parts at the imaging focus, the width of the light in the upper and lower directions reaching the lens 2' is too large and leaks out from the upper and lower edges of the lens 2', resulting in the light effect failing to achieve the expected effect. Therefore, this design method performs poorly in terms of efficiency and light pattern.

[0004] In addition, reference Figure 2 Since the existing solution requires a focal length L1 to be reserved behind the lens 2', and then a length L2 required for focusing by the reflector 1' or the concentrator is superimposed, the total length of the optical system is generally designed to be more than 100 mm, occupying a lot of space inside the front of the vehicle. Utility Model Content

[0005] In order to solve the above problems, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] An optical module, comprising:

[0007] light source;

[0008] A reflector, wherein the light source is disposed at or near the light-emitting focus of the reflector, and the imaging focus of the reflector is located between the first lens and the second lens;

[0009] A first lens is disposed near the light-emitting surface of the reflector and is used to collimate the light in a lateral direction;

[0010] A second lens is used for allowing the light transmitted through the first lens to pass through and vertically collimating the light;

[0011] The first lens and the second lens together form a composite focus, and the composite focus is located near the root of the reflector.

[0012] In one embodiment, an intersection line between a side surface of the second lens away from the first lens and a vertical plane extending in the front-to-back direction is an outwardly convex arc line for converging outgoing light in the vertical direction.

[0013] In one embodiment, a curvature radius of a surface of the second lens away from the first lens is 900 mm to 1500 mm.

[0014] In one embodiment, the projection of a surface of the first lens on one side close to the second lens on a horizontal plane is an outwardly convex arc line, and the first lens forms a vertical focal line on a side close to the second lens for converging light in a horizontal direction.

[0015] In one embodiment, the first lens is an aplanatic lens.

[0016] In one embodiment, the positive light emitting direction of the light source is configured to be forward and obliquely upward, and an angle α is formed between the positive light emitting direction and the horizontal plane, and 5°≤α≤25°.

[0017] In one embodiment, an angle between the positive light emitting direction and the horizontal plane is 5°≤α≤15°.

[0018] In one embodiment, the reflective surface of the reflector is an ellipsoidal surface.

[0019] In one embodiment, a cut-off line structure is provided at the root of the reflector to form a low-beam cut-off line.

[0020] A means of transport comprises any one of the optical modules described above.

[0021] In this application, the imaging focus of the reflector is on the side of the first lens close to the second lens, which will reduce the width of the final light-emitting surface in the vertical direction, making the light emission and imaging more focused and more efficient. After testing, even if the opening size of the optical module in the vertical direction is designed to be less than 10mm, there is still very good light emission performance, and the light emission efficiency can reach more than 40%. In addition, since the width of the light in the vertical direction at the second lens becomes smaller after crossing up and down at the imaging focus, it can all enter the second lens, avoiding leakage from the upper and lower edges of the second lens, making the light effect better.

[0022] In this embodiment, the composite focal point of the two lenses is located near the root of the reflector, and the overall length of the optical module is only the length of the composite focal length. There is no need to superimpose the focal length L2 of the reflector and the focal length L1 of the lens as in the traditional solution. Therefore, compared with the traditional structure, the length of the optical module is significantly shortened, and the length can be less than 30 mm, and will not encroach on the space of the head of the vehicle.

[0023] This application has better width, which can significantly improve the optical performance while ensuring the integrity and beauty of the appearance of the headlight module.

[0024] Since the first lens and the second lens can only focus and collimate the light emitted along the preset direction in a unidirectional manner, the problem of focusing sunlight or light emitted in other directions can be avoided, and the best lighting effect is presented.

[0025] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a mainstream optical module with narrow upper and lower openings;

[0028] Figure 2 A schematic diagram of the total length of the current optical module is designed;

[0029] Figure 3 A schematic diagram of the three-dimensional structure of an optical module provided in one embodiment of the present application;

[0030] Figure 4 A schematic diagram of the optical path after the imaging focus is designed to be closer to the second lens for this application;

[0031] Figure 5 A schematic top view of the second lens of the optical module provided in one embodiment of the present application collimating light;

[0032] Figure 6 A schematic top view of the second lens of the optical module provided by another embodiment of the present application collimating light;

[0033] Figure 7 A schematic top view of the first lens of the optical module provided in one embodiment of the present application collimating light;

[0034] Figure 8 The low beam kink light pattern is formed after the first lens is horizontally collimated and the second lens is vertically collimated;

[0035] Fig. 9 This is a high beam light pattern with prominent brightness in the middle formed after two rounds of collimation;

[0036] Fig.10A schematic top view of light collimation when the first lens of an optical module provided by another embodiment of the present application is an equal optical path lens;

[0037] Fig.11 for Fig.10 The equal optical path first lens and the vertically collimated second lens cooperate to form a low beam flat light pattern with a smooth center;

[0038] Fig.12 A schematic diagram of setting a shielding structure in an existing narrow-opening optical module;

[0039] Fig.13 for Fig.12 Schematic diagram of the main light pattern formed by the optical module;

[0040] Fig.14 for Fig.12 Schematic diagram of the ineffective optical area formed by the optical module;

[0041] Fig.15 A schematic diagram of an angle α formed between a positive light emitting direction of a light source and a horizontal plane in an optical module provided in another embodiment of the present application;

[0042] Fig.16 for Fig.15 A schematic diagram of an ineffective optical area formed by the optical module shown;

[0043] In the figure:

[0044] 1', reflector; 2', lens; 3', light source; 10', shielding structure;

[0045] 1. Reflector; 2. Second lens; 3. Light source; 5. First lens. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0048] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0050] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0052] The imaging focus of the reflector 1' in the existing optical solution is very close to the reflector (as shown in Figure 1 , Figure 2 The arrangement is as follows: the imaging focus of the reflector is closer to the reflector 1'), which will result in a larger width in the vertical direction of the final light-emitting surface, scattered light, and poor light-emitting efficiency; and if the width of the vertical direction of the light reaching the lens 2' after crossing up and down at the imaging focus is too large, it will leak out from the upper and lower edges of the lens 2', and the light effect will be worse.

[0053] Furthermore, because the existing solution requires a focal length L1 to be reserved behind the lens 2', and a length L2 required for focusing by the reflector 1' or the concentrator is superimposed, the total length of the optical system is generally designed to be more than 100 mm, occupying a lot of space inside the front of the vehicle.

[0054] In order to solve the above problems, the optical module provided by the present application is exemplarily described below:

[0055] As an alternative implementation, see Figure 3 Optical modules include:

[0056] Light source 3;

[0057] A reflector 1, wherein the light source 3 is disposed at or near the light-emitting focus of the reflector 1, and the imaging focus of the reflector 1 is located between the first lens 5 and the second lens 2;

[0058] A first lens 5 is disposed near the light-emitting surface of the reflector 1 and is used to collimate the light in a lateral direction;

[0059] The second lens 2 is used to allow the light transmitted through the first lens 5 to pass through and to collimate the light vertically;

[0060] The first lens 5 and the second lens 2 together form a composite focus, and the composite focus is located near the root of the reflector 1 .

[0061] Specifically, the horizontal direction mentioned above may be a horizontal direction, and the vertical direction may be a vertical direction. Figure 4 In this application, the imaging focus of the reflector 1 is on the side of the first lens 5 close to the second lens 2 (farther away from the reflector 1), which will reduce the width of the final light-emitting surface in the vertical direction, making the light emission and imaging more focused and more efficient. After testing, even if the opening size of the optical module in the vertical direction is designed to be less than 10mm, there is still very good light emission performance, and the light emission efficiency can reach more than 40%. In addition, since the width of the light in the vertical direction when it reaches the second lens 2 after crossing up and down at the imaging focus becomes smaller, it can all enter the second lens 2, avoiding leakage from the upper and lower edges of the second lens 2, making the light effect better.

[0062] In this embodiment, the composite focal point of the two lenses is located near the root of the reflector 1, and the overall length of the optical module is only the length of the composite focal length. There is no need to superimpose the focal length L2 of the reflector 1 and the focal length L1 of the lens as in the traditional solution. Therefore, compared with the traditional structure, the length of the optical module is significantly shortened, and the length can be less than 30 mm, and will not encroach on the space of the head of the vehicle.

[0063] This application has better width, which can significantly improve the optical performance while ensuring the integrity and beauty of the appearance of the headlight module.

[0064] Since the first lens 5 and the second lens 2 can only focus and collimate the light emitted along the preset direction in a unidirectional manner, the problem of focusing sunlight or light emitted in other directions can be avoided, and the best lighting effect is presented.

[0065] refer to Figure 5 In some embodiments, the intersection of the front surface of the second lens 2 away from the first lens 5 and the vertical plane extending in the front-to-back direction is a convex arc line, which is used to converge the outgoing light in the vertical direction. Specifically, the surface of the second lens 2 away from the first lens 5 is convex, and the light entering the second lens 2 converges to the preset horizontal focal line, which can form a clear light pattern. The surface of the second lens 2 close to the first lens 5 of the present application can be as follows Figure 4 , Figure 5 The plane can also be Figure 6 Preferably, in some embodiments, the radius of curvature of the surface of the second lens 2 away from the first lens 5 is 900 mm to 1500 mm. According to tests, when this parameter is used, the light pattern formed has clear boundaries, high light pattern brightness, and high overall light energy utilization.

[0066] When the second lens 2 adopts the above configuration, Figure 7 In some embodiments, the projection of the surface of one side of the first lens 5 close to the second lens 2 on the horizontal plane is an outward convex arc line, and the first lens 5 forms a vertical focal line on the side close to the second lens 2, which is used to converge light in the horizontal direction. Specifically, the first lens 5 performs a horizontal convergence and collimation on the light entering it toward the vertical focal line, and the collimated light is subjected to a second vertical convergence and collimation through the second lens 2. The horizontal collimation and the vertical collimation can fully collimate the light type and form an inflection point with prominent brightness in the middle. When applied to the low beam module, after collimation in two directions under the low beam condition, the following is formed. Figure 8 A low beam kink light type with an inflection point in the middle; when applied to a high beam module, it forms a low beam kink light type after two collimations under high beam conditions. Fig. 9 A high beam light pattern with prominent brightness in the middle part. Due to the prominent brightness of the lower edge of the high beam light pattern, when the high beam is in high beam working condition and the high beam and low beam are turned on synchronously, the bending line in the middle part of the upper edge of the low beam light pattern can be covered, thereby making the entire light pattern formed by the high beam working condition more complete.

[0067] refer to Fig.10 In some embodiments, the first lens 5 is an equal-path lens.

[0068] Specifically, the first lens 5 is an equal optical path lens, which performs the same degree of collimation on the light entering it in each direction perpendicular to the light transmission direction, and does not form an inflection point in the middle area. Therefore, when applied to the low beam module, it can form the following under the low beam working condition: Fig.11 The low beam flat light type with a smooth middle part.

[0069] In such Figure 12-13In the common module scheme of the prior art shown in the figure, the direct light emitted by the light source 3' along the positive light emitting direction directly enters the lens 2', which will cause strong stray light, dazzle people, and cause great harm to driving safety. Fig.13 It is necessary to set a shielding structure 10' in front of the light source 3' to shield the direct light emitted by the light source 3' and eliminate the influence of the direct light on the light pattern. However, the shielding structure 10' needs to be painted black and has high requirements for the setting position and setting height. If the position is low, the expected shading effect cannot be achieved, the stray light caused by the direct light is still obvious, and the subjective effect is poor; if the position is high, the expected main light pattern will be blocked. In addition, if Fig.14 , because part of the light emitted by the light source 3' along the upper edge of the shielding structure 10' will leak out of the optical module from the front of the reflector 1', there will be a large invalid optical area above the shielding structure, and accordingly less light will enter the lens 2', and the light utilization efficiency is very low. In order to solve this problem, refer to Fig.15 In some embodiments, the positive light emitting direction of the light source 3 is configured to be forward and obliquely upward, and an angle α is formed between the positive light emitting direction and the horizontal plane, 5°≤α≤25°.

[0070] Specifically, in this embodiment, the positive light emitting direction of the light source 3 is configured to be forward and obliquely upward, that is, the direct light emitted by the light source 3 along the positive light emitting direction does not pass through the first lens 5 / second lens 2 in front, thereby avoiding the formation of stray light that causes blurred light pattern boundaries or affects the main light pattern;

[0071] In this embodiment, the angle α between the positive light emitting direction and the horizontal plane is set to be between 5° and 25°, so that the angle value β of the light emitted by the light source 3 and leaking out of the optical module from the front of the reflector 1 is smaller (see Fig.16 ), compared with the solution of setting a shielding structure, the invalid optical area is reduced, more light enters the lens, and the light utilization efficiency is high.

[0072] This embodiment no longer requires setting Fig.13 The shielding structure 10' shown saves the processing and installation costs caused by setting up the shielding structure 10', and because there is no need to set up the shielding structure 10', it avoids display problems caused by insufficient setting accuracy of the shielding structure 10', thereby improving the installation tolerance rate of the optical module.

[0073] refer to Fig.15 In some embodiments, the angle between the positive light emitting direction of the light source 3 and the horizontal plane is 5°≤α≤15°. According to tests, when the angle value of 5°≤α≤15° is adopted, the main light pattern finally formed after lens collimation has clear boundaries, high brightness, and higher overall light energy utilization.

[0074] refer to Figure 3In some embodiments, the reflective surface of the reflector 1 is an ellipsoidal surface. The ellipsoidal surface has a high reflectivity to light, which can improve the overall luminous efficiency of the optical module.

[0075] Furthermore, in some embodiments, a cut-off line structure is provided at the root of the reflector 1 to form a low-beam cut-off line.

[0076] The present application also provides a vehicle, comprising any of the optical modules described above.

[0077] The above-mentioned means of transportation may be a car, a train, a high-speed rail or other means of transportation that requires headlights. The imaging focus of the reflector 1 of the optical module set on the vehicle in the present application is on the side of the first lens 5 close to the second lens 2 (farther away from the reflector 1), which will reduce the width of the final light-emitting surface in the up-down direction, making the light emission and imaging more focused and the light emission more efficient. According to tests, even if the opening size of the optical module in the up-down direction is designed to be less than 10 mm, there is still very good light emission performance, and the light emission efficiency can reach more than 40%. In addition, since the width of the light in the up-down direction reaching the second lens 2 becomes smaller after crossing up and down at the imaging focus, it can all enter the second lens 2, avoiding leakage from the upper and lower edges of the second lens 2, making the light effect better.

[0078] In this embodiment, the composite focal point of the two lenses is located near the root of the reflector 1, and the overall length of the optical module is only the length of the composite focal length. There is no need to superimpose the focal length L2 of the reflector 1 and the focal length L1 of the lens as in the traditional solution. Therefore, compared with the traditional structure, the length of the optical module is significantly shortened, and the length can be less than 30 mm, and will not encroach on the space of the head of the vehicle.

[0079] This application has better width, which can significantly improve the optical performance while ensuring the integrity and beauty of the appearance of the headlight module.

[0080] Since the first lens 5 and the second lens 2 can only focus and collimate the light emitted along the preset direction in a unidirectional manner, the problem of focusing sunlight or light emitted in other directions can be avoided, and the best lighting effect is presented.

[0081] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0082] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An optical module, characterized in that: include: light source; A reflector, wherein the light source is disposed at or near the light-emitting focus of the reflector, and the imaging focus of the reflector is located between the first lens and the second lens; A first lens is disposed near the light-emitting surface of the reflector and is used to collimate the light in a lateral direction; A second lens is used for allowing the light transmitted through the first lens to pass through and vertically collimating the light; The first lens and the second lens together form a composite focus, and the composite focus is located near the root of the reflector.

2. An optical module according to claim 1, characterized in that: The intersection line between a side surface of the second lens away from the first lens and a vertical plane extending in the front-to-back direction is an outward convex arc line, which is used to converge the outgoing light in the vertical direction.

3. An optical module according to claim 2, characterized in that: The curvature radius of a surface of the second lens which is away from the first lens is 900 mm to 1500 mm.

4. An optical module according to claim 2 or 3, characterized in that: The projection of a side surface of the first lens close to the second lens on a horizontal plane is an outwardly convex arc line, and the first lens forms a vertical focal line on a side close to the second lens for converging light in a horizontal direction.

5. An optical module according to claim 2 or 3, characterized in that: The first lens is an equal-path lens.

6. The optical module according to claim 1, characterized in that: The positive light emitting direction of the light source is configured to be forward and obliquely upward, and an angle α is formed between the positive light emitting direction and the horizontal plane, and 5°≤α≤25°.

7. An optical module according to claim 6, characterized in that: The angle formed between the positive light emitting direction and the horizontal plane is 5°≤α≤15°.

8. The optical module according to claim 1, characterized in that: The reflecting surface of the reflecting mirror is an ellipsoidal surface.

9. The optical module according to claim 1, characterized in that: A cut-off line structure is provided at the root of the reflector to form a low beam cut-off line.

10. A means of transport, characterized in that: The optical module comprises the optical module described in any one of claims 1 to 9.

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