Optical module and vehicle lamp

Abstract

An optical module and a vehicle lamp relate to the technical field of vehicle lamp illumination. The optical module comprises a radiator, a circuit board and a light source arranged on the circuit board, wherein a primary optical element and a lens are sequentially arranged on the light emitting side of the light source; the circuit board is arranged on the mounting surface of the radiator; the radiator is provided with a step part, and the vertical face of the step part and the circuit board are oppositely arranged at intervals. Part of light emitted by the light source is reflected to the vertical face of the step portion through the primary optical element and reflected again by the vertical face of the step portion, part of the light is shielded and does not exit from the lens, and the other part of the light is reflected to the primary optical element. And after being reflected again by the primary optical element, the light is shielded and does not exit from the lens. According to the optical module, the pattern structure is arranged on the vertical face of the step portion of the radiator in the protruding mode, so that stray light is weakened in the mode of being low in cost, wide in application range and easy to design and machine, and the lighting effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting technology, and more specifically, to an optical module and a vehicle lamp. Background Technology

[0002] Vehicle headlights typically contain optical modules, with reflective and transmissive types being the two main types. Stray light is a common defect in optical modules. Stray light usually has an irregular shape, which can cause glare or irregular bright spots on the illuminated road surface, reducing the aesthetic appeal of the light pattern. If the brightness of the stray light is too high, it can also lead to regulatory non-compliance and reduce the lighting effect.

[0003] There are two main methods for eliminating stray light in existing transmissive optical modules: blackening treatment and texture setting. Blackening treatment involves using black paint or anodizing to color the surface of a metal heat sink, reducing the reflectivity of the heat sink surface and thus reducing the brightness of stray light. However, this method is too expensive and can only be used on metal parts. Texture setting involves using chemical etching to create a texture on plastic lens holders, mirrors, and other parts to increase surface roughness, disrupt the optical path of stray light, and reduce the brightness of stray light. However, texture design and manufacturing are relatively difficult. Utility Model Content

[0004] The purpose of this invention is to provide an optical module and vehicle light that can reduce stray light and improve lighting effect in a way that is lower in cost and has a wider range of applications.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In one aspect, this utility model provides an optical module, including a heat sink, a circuit board, and a light source disposed on the circuit board. A primary optical element and a lens are sequentially disposed on the light-emitting side of the light source. The circuit board is disposed on the mounting surface of the heat sink. The heat sink has a stepped portion, and the vertical surface of the stepped portion is spaced apart from the circuit board. The vertical surface of the stepped portion is provided with a patterned structure. Part of the light emitted from the light source is reflected by the primary optical element to the vertical surface of the stepped portion, and is reflected again by the vertical surface of the stepped portion. Part of the light is blocked and does not exit from the lens, while another part of the light is reflected to the primary optical element, and is blocked after being reflected again by the primary optical element and does not exit from the lens.

[0007] Optionally, the pattern structure is wavy and extends along the width of the step.

[0008] Optionally, the optical module also includes a light-blocking plate, which is disposed on the facade of the stepped portion or on the light-emitting path of the primary optical element reflecting light.

[0009] Optionally, the optical module also includes a lens holder with openings on opposite sides, the lens being mounted on one side of the lens holder opening and the heat sink being mounted on the other side of the lens holder opening.

[0010] Optionally, the inner wall of the lens holder is provided with a patterned structure.

[0011] Optionally, the lens includes a light-emitting surface and sidewalls disposed on the upper and lower sides of the light-emitting surface, the sidewalls having a patterned structure.

[0012] Optionally, the pattern structure is wavy.

[0013] Alternatively, the surface of the stepped portion of the radiator is coated with black paint, or the stepped portion of the radiator is colored black using an anodizing process.

[0014] Optionally, the surface of the patterned structure is provided with a leather texture.

[0015] Another aspect of this utility model is to provide a vehicle lamp, including an optical module.

[0016] The beneficial effects of this utility model include at least one of the following:

[0017] This application provides an optical module including a heat sink, a circuit board, and a light source disposed on the circuit board. A primary optical element and a lens are sequentially disposed on the light-emitting side of the light source. The circuit board is disposed on the mounting surface of the heat sink. The heat sink has a stepped portion, with the vertical surface of the stepped portion spaced apart from the circuit board. A patterned structure is protruding from the vertical surface of the stepped portion. Part of the light emitted from the light source is reflected by the primary optical element to the vertical surface of the stepped portion, and then reflected again by the vertical surface of the stepped portion. A portion of this light is blocked and does not exit through the lens, while another portion is reflected back to the primary optical element, reflected again by the primary optical element, and then blocked and does not exit through the lens. By providing a patterned structure on the vertical surface of the stepped portion, the light emitted from the light source is reflected in different directions at different positions of the patterned structure, thereby disrupting the original optical path of stray light and preventing most stray light from exiting through the lens, thus reducing the impact of stray light on the target light pattern. The aforementioned optical module, by providing a patterned structure on the vertical surface of the stepped portion of the heat sink, weakens stray light in a way that is lower in cost, has a wider range of applications, and is easier to design and manufacture, thereby improving the lighting effect.

[0018] This application also provides a vehicle lamp, including an optical module. By using the optical module, the aforementioned vehicle lamp can reduce stray light and decrease its brightness, thereby improving the lighting effect of the lamp while meeting lighting regulations. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 One of the structural schematic diagrams of the optical module provided in the embodiment of this utility model;

[0021] Figure 2 This is the second schematic diagram of the structure of the optical module provided in the embodiment of the present utility model;

[0022] Figure 3 The third schematic diagram of the optical module provided in the embodiment of this utility model;

[0023] Figure 4 Fourth schematic diagram of the structure of the optical module provided in the embodiment of this utility model;

[0024] Figure 5 A schematic diagram of an optical path that does not generate stray light, provided for an embodiment of this utility model;

[0025] Figure 6 A schematic diagram of the heat sink of the optical module provided in this embodiment of the utility model;

[0026] Figure 7 A cross-sectional view of the heat sink of the optical module provided in this embodiment of the utility model;

[0027] Figure 8 A schematic diagram of the lens holder of the optical module provided in this embodiment of the utility model;

[0028] Figure 9 A schematic diagram of the lens structure of the optical module provided in this embodiment of the utility model.

[0029] Icons: 100-Optical module; 110-Heat sink; 111-Step section; 120-Circuit board; 130-Light source; 140-Primary optical element; 150-Lens; 151-Light emitting surface; 152-Side wall surface; 160-Light blocking plate; 170-Lens bracket; 180-Patterned structure; a-Width direction; b-Height direction. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 utility model based on the specific circumstances.

[0036] Please refer to Figure 1 This embodiment provides an optical module 100, including a heat sink 110, a circuit board 120, and a light source 130 disposed on the circuit board 120. A primary optical element 140 and a lens 150 are sequentially disposed on the light-emitting side of the light source 130. The circuit board 120 is disposed on the mounting surface of the heat sink 110. The heat sink 110 has a stepped portion 111, and the vertical surface of the stepped portion 111 is spaced apart from the circuit board 120. A patterned structure 180 is protruding from the vertical surface of the stepped portion 111. Part of the light emitted from the light source 130 is reflected by the primary optical element 140 to the vertical surface of the stepped portion 111, and is reflected again by the vertical surface of the stepped portion 111. Part of the light is blocked and does not exit from the lens 150, and another part of the light is reflected to the primary optical element 140, and is blocked after being reflected again by the primary optical element 140 and does not exit from the lens 150.

[0037] Specifically, this application provides an optical module 100, such as Figure 1 As shown, it includes a heat sink 110, a circuit board 120 mounted on the mounting surface of the heat sink 110, and a light source 130 connected to the circuit board 120. The heat sink 110 also has a stepped portion 111, which has a predetermined distance from the circuit board 120, and the vertical surface of the stepped portion 111 is opposite to the light source 130, so that the light emitted from the light source 130 can be reflected by the vertical surface of the stepped portion 111. A primary optical element 140 and a lens 150 are sequentially arranged on the light-emitting side of the light source 130. Preferably, the primary optical element 140 is a reflector.

[0038] In order to reduce stray light other than the target light pattern received on the light-emitting side of lens 150, such as Figure 2 As shown, the facade of the stepped portion 111 is provided with a patterned structure 180. Light emitted from the light source 130, after being reflected by the patterned structure 180 of the stepped portion 111, can generate reflected light in different directions, thus disrupting the original optical path of the stray light; for example... Figure 5 As shown, after reflection by the primary optical element 140, some light rays exit through the lens 150 and form the target light pattern on the light-emitting side of the lens 150. Another portion of light rays that would originally form stray light are reflected by the pattern structure 180 of the stepped portion 111 or by the primary optical element 140. The light rays deviate from the light rays forming the target light pattern at a large angle, so that most of them cannot exit through the lens 150. Therefore, the stray light formed on the light-emitting side of the lens 150 other than the target light pattern is greatly reduced. Even if there is a small amount of stray light, the propagation angle of the light rays is changed by the stepped portion 111, and the diffusion angle is also changed after passing through the lens 150, which reduces the brightness of the stray light and meets the lighting regulations.

[0039] By setting a textured structure 180 on the vertical surface of the stepped portion 111 to weaken stray light, the production cost of the optical module 100 is reduced. Simultaneously, the textured structure 180 is easy to design and manufacture, eliminating the need for additional mold costs or parts during production. Existing optical modules typically use chemical etching to create textures on the reflective surface to weaken stray light, but such textures are difficult to apply to metal parts such as aluminum alloy die-castings. During the production of aluminum alloy die-casting molds, the fine textures on the mold are easily washed away and flattened by the impact force of the molten metal, leading to texture failure.

[0040] Furthermore, in plastic molds, textured surfaces increase the demolding force required and the risk of mold sticking. Therefore, compared to textured surfaces, the pattern structure 180 of this application is easier to apply to the surface of plastic and metal parts, improving production efficiency and reliability, and expanding the applicability of production.

[0041] It should be noted that, in one possible implementation of this application, firstly, please refer to... Figure 6 and Figure 7 The pattern structure 180 is wavy and extends along the width direction a of the step portion 111.

[0042] Specifically, if Figure 6 and Figure 7 As shown, the patterned structure 180 on the facade of the step portion 111 is formed by splicing multiple arc surfaces along the width direction a of the radiator 110, and each arc surface extends along the height direction b of the step portion 111, making the entire facade a wavy surface. This application does not impose any restrictions on the curvature of each arc surface; the curvature of the multiple arc surfaces can be the same or different, as long as it ensures that the light emitted from the light source 130, after being reflected by the patterned structure 180 of the step portion 111, can generate reflected light in different directions, thereby disrupting the original optical path of stray light.

[0043] Optionally, a textured surface can be provided on the patterned structure 180 of the facade of the stepped portion 111 to further increase the surface roughness of the facade, disrupt the optical path of stray light, and improve the reliability of the optical module 100 in reducing stray light.

[0044] Second, such as Figure 9As shown, lens 150 includes a light-emitting surface 151 and sidewalls 152 disposed on the upper and lower sides of the light-emitting surface 151. In order to further disrupt the optical path of stray light and improve the reliability of the optical module 100 in weakening stray light, the sidewalls 152 are provided with a patterned structure 180. Part of the light rays are emitted through lens 150 and form a main light pattern on the light-emitting side of lens 150. Another part of the light rays can be emitted through the patterned structure 180 of sidewall 152, deviating at a large angle from the light rays forming the main light pattern, so that they cannot be emitted through lens 150. Therefore, stray light other than the target light pattern is formed on the light-emitting side of lens 150.

[0045] Optionally, the pattern structure 180 provided on the side wall surface 152 is wavy and is formed by splicing multiple arc surfaces. Furthermore, the surface of the pattern structure 180 is provided with a leather texture to increase the surface roughness of the side wall surface 152 and disrupt the optical path of stray light.

[0046] Third, the surface of the stepped portion 111 of the radiator 110 is coated with black paint, or the stepped portion 111 of the radiator 110 is colored black by anodizing.

[0047] Specifically, in order to reduce the reflectivity of the vertical surface of the stepped portion 111 of the radiator 110 and thus reduce the brightness of stray light, the surface of the stepped portion 111 of the radiator 110 is coated with black paint; of course, black paint can also be applied to the vertical surface of the stepped portion 111 of the radiator 110, as long as it can ensure that the light emitted by the light source 130 is reduced in reflection after passing through the surface coated with black paint.

[0048] Besides reducing the reflectivity of the facade of the step portion 111 by applying black paint, the reflectivity can also be reduced by anodizing the facade of the step portion 111. Of course, the reflectivity of the facade of the step portion 111 can also be reduced by anodizing the entire radiator 110. This application does not limit this method.

[0049] The optical module 100 provided in this application includes a heat sink 110, a circuit board 120, and a light source 130 disposed on the circuit board 120. A primary optical element 140 and a lens 150 are sequentially disposed on the light-emitting side of the light source 130. The circuit board 120 is disposed on the mounting surface of the heat sink 110. The heat sink 110 has a stepped portion 111, and the vertical surface of the stepped portion 111 is spaced apart from the circuit board 120. A patterned structure 180 is protruding from the vertical surface of the stepped portion 111. Part of the light emitted from the light source 130 is reflected by the primary optical element 140 to the vertical surface of the stepped portion 111, and is reflected again by the vertical surface of the stepped portion 111. Part of the light is blocked and does not exit from the lens 150, and another part of the light is reflected to the primary optical element 140, and is blocked after being reflected again by the primary optical element 140 and does not exit from the lens 150. By providing a patterned structure 180 on the vertical surface of the stepped portion 111, the light emitted from the light source 130 is reflected in different directions at different positions of the patterned structure 180, thereby disrupting the original optical path of stray light and preventing most stray light from escaping through the lens 150, thus reducing the impact of stray light on the target light pattern. The aforementioned optical module 100, by protruding the patterned structure 180 on the vertical surface of the stepped portion 111 of the heat sink 110, weakens stray light and improves the lighting effect in a way that is lower in cost, more widely applicable, and easier to design and manufacture.

[0050] For example, please refer to Figure 1 , Figure 3 and Figure 5 To further block stray light and prevent it from entering the lens 150, the optical module 100 also includes a light-blocking plate 160. The light-blocking plate 160 is disposed on the vertical surface of the stepped portion 111 or on the light-out path of the reflected light from the primary optical element 140. In actual production, the shape and size of the light-blocking plate 160 can be adjusted according to the target light pattern, so that stray light that does not propagate according to the expected light path is blocked by the light-blocking plate 160, further improving the reliability of the optical module 100 in reducing stray light.

[0051] In one possible implementation of this application, such as Figure 1 and Figure 3 As shown, the optical module 100 also includes a lens bracket 170, which has openings on opposite sides. A lens 150 is mounted on one side opening of the lens bracket 170, and a heat sink 110 is mounted on the other side opening of the lens bracket 170.

[0052] Specifically, the lens holder 170 has a cylindrical structure with openings on both sides, such as... Figure 4As shown, the lens 150 is installed at the opening on one side of the lens bracket 170 to be fixedly connected to the lens bracket 170. The cylindrical lens bracket 170 surrounds the periphery of the lens 150 through the opening, which not only improves the stability of the optical module 100, but also has the function of blocking stray light. It blocks stray light entering from around the lens bracket 170 and improves the illumination effect of the optical module 100.

[0053] like Figure 4 As shown, the heat sink 110 is installed at the opening on the other side of the lens bracket 170 to be fixedly connected to the lens bracket 170; the light blocking plate 160 is fixedly connected to the lens bracket 170 and extends into the lens bracket 170 through the opening to ensure the blocking effect on stray light.

[0054] Optionally, such as Figure 8 As shown, to further enhance the attenuation effect on stray light, the inner wall of the lens holder 170 is provided with a textured structure 180, making the inner wall of the lens holder 170 rough. This causes stray light that does not propagate along the expected optical path to be reflected in multiple directions through the inner wall of the lens holder 170, thus deviating from the optical path that forms the target light pattern. The textured structure 180 on the inner wall of the lens holder 170 can be a wavy textured structure 180.

[0055] Furthermore, in order to further improve the roughness of the inner wall of the lens holder 170, the surface of the patterned structure 180 can also be textured.

[0056] In another aspect, this utility model provides a vehicle lamp, including an optical module 100. By using the optical module 100, the vehicle lamp can reduce stray light and decrease its brightness, thereby improving the lighting effect while meeting lighting regulations. The specific structure and beneficial effects of the optical module 100 have been described in detail above and will not be repeated here.

[0057] The above description is merely an optional embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0058] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. An optical module, characterized in that, The device includes a heat sink (110), a circuit board (120), and a light source (130) disposed on the circuit board (120). A primary optical element (140) and a lens (150) are sequentially disposed on the light-emitting side of the light source (130). The circuit board (120) is disposed on the mounting surface of the heat sink (110). The heat sink (110) has a stepped portion (111), the vertical surface of which is spaced apart from the circuit board (120). 11) The facade is provided with a patterned structure (180). Part of the light emitted from the light source (130) is reflected by the primary optical element (140) to the facade of the step portion (111), and is reflected again by the facade of the step portion (111). Part of the light is blocked and does not exit from the lens (150), and another part of the light is reflected to the primary optical element (140), and is blocked after being reflected again by the primary optical element (140) and does not exit from the lens (150).

2. The optical module according to claim 1, characterized in that, The pattern structure (180) is wavy and extends along the width direction (a) of the stepped portion (111).

3. The optical module according to claim 1, characterized in that, The optical module (100) also includes a light-blocking plate (160), which is disposed on the facade of the stepped portion (111) or on the light-emitting path of the primary optical element (140) reflecting light.

4. The optical module according to claim 1, characterized in that, The optical module (100) also includes a lens bracket (170), which has openings on opposite sides. The lens (150) is mounted on one side opening of the lens bracket (170), and the heat sink (110) is mounted on the other side opening of the lens bracket (170).

5. The optical module according to claim 4, characterized in that, The inner wall of the lens holder (170) is provided with a patterned structure (180).

6. The optical module according to claim 1, characterized in that, The lens (150) includes a light-emitting surface (151) and sidewalls (152) disposed on the upper and lower sides of the light-emitting surface (151), and the sidewalls (152) are provided with a patterned structure (180).

7. The optical module according to claim 5 or 6, characterized in that, The pattern structure (180) is wavy.

8. The optical module according to any one of claims 1-6, characterized in that, The surface of the stepped portion (111) of the radiator (110) is coated with black paint, or the stepped portion (111) of the radiator (110) is colored black by anodizing.

9. The optical module according to any one of claims 1-6, characterized in that, The surface of the patterned structure (180) is provided with a leather texture.

10. A vehicle light, characterized in that, Includes the optical module (100) as described in any one of claims 1-9 above.

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