Optical system, automobile lamp and automobile

Abstract

The utility model discloses an optical system, an automobile lamp and an automobile, and belongs to the technical field of automobile lighting. Wherein the optical system comprises a lens, a reflecting mirror, an LED light source and a baffle, the reflecting mirror is located behind the lens, the reflecting mirror is provided with a reflecting surface, the reflecting surface is provided with a parabola contour or an oval contour, and the reflecting mirror is provided with a first focus and a second focus; the LED light source is located below the reflecting mirror, and the LED light source is arranged at the first focal point in the mode of being perpendicular to the optical axis; the baffle is located between the reflector and the LED light source, and the baffle is arranged close to the first focus and can block part of light emitted by the LED light source. The energy distribution state can be changed by changing the distribution mode of the baffles, and energy gathering of the baffles is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting technology, and in particular to an optical system, a vehicle lamp, and an automobile. Background Technology

[0002] Currently, most automotive low-beam headlights use a projector structure. In existing technology, the projector structure generally consists of an LED light source, a reflector, a baffle, and a lens. Its working principle is as follows: the reflector, based on the principle of an ellipsoid or paraboloid, collects and reflects the light emitted by the LED light source, converging it at a second focal point. This second focal point is also the focal point of the lens. By placing a baffle at the second focal point, part of the light is blocked to form a cutoff line. The light is then converged by the lens to obtain the low-beam light pattern with this cutoff line. However, because the reflector converges the light at the second focal point, the corresponding area of ​​the baffle experiences high temperatures due to energy concentration, making the baffle susceptible to thermal deformation and melting. Therefore, the heat resistance of the baffle material is crucial, increasing manufacturing costs. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an optical system that can change the energy distribution state by altering the distribution pattern of the baffles, thereby reducing energy concentration at the baffles.

[0004] This invention also proposes a vehicle lamp that utilizes the aforementioned optical system.

[0005] This utility model also proposes a car that uses the above-mentioned headlights.

[0006] An optical system according to a first aspect of this utility model includes a lens, a reflector, an LED light source, and a baffle. The reflector is located behind the lens and has a reflective surface with a parabolic or elliptical profile. The reflector has a first focal point and a second focal point. The LED light source is located below the reflector and is positioned perpendicular to the optical axis at the first focal point. The baffle is located between the reflector and the LED light source, and is positioned near the first focal point to block some of the light emitted by the LED light source.

[0007] The optical system according to the above embodiments of the present invention has at least the following beneficial effects:

[0008] The optical system provided in this embodiment of the invention uses a baffle to block part of the light emitted by the LED light source, thereby controlling the light distribution falling on the reflector. The reflector reflects the light not blocked by the baffle to the lens, which then projects a cutoff line and a light pattern that meets the light distribution standards. Compared to the traditional method of placing the baffle at the second focal point, this embodiment of the invention, by placing the baffle near the first focal point but offset from the second focal point, prevents the reflector from concentrating all the energy on the baffle, reducing the energy density on the baffle, reducing the hot spot area on the baffle, and thus effectively avoiding the risks of thermal deformation or melting caused by excessive energy concentration. This improves the service life of the baffle and reduces the heat resistance requirements of the baffle material, thereby reducing manufacturing costs. This embodiment of the invention simplifies the overall structure of the optical system through the offset arrangement of the baffle, making the structure more compact while meeting the light distribution requirements, reducing manufacturing costs, and facilitating assembly and maintenance.

[0009] According to some embodiments of the present invention, the baffle is located above or behind the LED light source.

[0010] According to some embodiments of the present invention, in a direction perpendicular to the optical axis, the projection of the LED light source coincides with the projection portion of the baffle.

[0011] According to some embodiments of the present invention, the baffle is located above and behind the LED light source and is integrally formed with the reflector.

[0012] According to some embodiments of this utility model, the baffle is flat.

[0013] According to some embodiments of the present invention, the outer surface of the baffle has a break.

[0014] According to some embodiments of the present invention, the outer surface of the baffle has a free-form surface.

[0015] According to some embodiments of the present invention, the reflector is ellipsoidal, and the reflector is the upper half of the ellipsoid and ends at the second focal point.

[0016] A vehicle light according to a second aspect of the present invention includes an optical system as described in any embodiment of the first aspect of the present invention, and further includes a main body, a circuit board and a heat sink. The lens is connected to the front end of the main body, the reflector is connected to the main body, the circuit board is mounted on the main body and located below the reflector, the LED light source is mounted on the circuit board, and the heat sink is connected to the rear end of the main body.

[0017] The vehicle light according to the above embodiments of the present invention has at least the following beneficial effects:

[0018] The vehicle lamp provided in this embodiment uses a baffle to block part of the light emitted by the LED light source, thereby controlling the light distribution falling on the reflector. The reflector reflects the light not blocked by the baffle to the lens, which then projects a cutoff line and a light pattern that meets the light distribution standards. Compared to the traditional method of placing the baffle at the second focal point, this embodiment of the invention, by placing the baffle near the first focal point but offset from the second focal point, prevents the reflector from concentrating all the energy on the baffle, reducing the energy density on the baffle, reducing hot spots on the baffle, and thus effectively avoiding the risks of thermal deformation or melting caused by excessive energy concentration. This improves the service life of the baffle and reduces the heat resistance requirements of the baffle material, thereby reducing manufacturing costs. The offset arrangement of the baffle in this embodiment of the invention simplifies the overall structure of the optical system, making the structure more compact while meeting light distribution requirements, reducing manufacturing costs, and facilitating assembly and maintenance. This embodiment of the invention uses a heat sink connected to the main body for heat dissipation, which helps to extend the service life of the vehicle lamp.

[0019] A car according to a third aspect of the present invention includes headlights as described in a second aspect of the present invention.

[0020] The automobile according to the above embodiments of the present invention has at least the following beneficial effects:

[0021] The vehicle headlights provided in this embodiment use a baffle to partially block the light emitted by the LED light source, thereby controlling the light distribution falling on the reflector. The reflector reflects the light not blocked by the baffle to the lens, which then projects a cutoff line and a light pattern that meets the light distribution standards. Compared to the traditional method of placing the baffle at the second focal point, by placing the baffle near the first focal point but offset from the second focal point, the reflector prevents all energy from concentrating on the baffle, reducing the energy density on the baffle and reducing hot spots on the baffle. This effectively avoids the risks of thermal deformation or melting caused by excessive energy concentration, improves the service life of the baffle, and reduces the heat resistance requirements of the baffle material, thus reducing manufacturing costs. The offset arrangement of the baffle simplifies the overall structure of the optical system, making the structure more compact while meeting light distribution requirements, reducing manufacturing costs, and facilitating assembly and maintenance. The headlight is connected to a heat sink for heat dissipation, which helps extend the lifespan of the headlight.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the optical system of some embodiments of the present invention;

[0025] Figure 2 This is a partial schematic diagram of the optical system of some embodiments of the present invention;

[0026] Figure 3 This is a schematic diagram of a vehicle lamp according to some embodiments of the present invention.

[0027] In the attached figures, the following labels are used:

[0028] Lens 100; Reflector 200; First focal point 201; Second focal point 202; Optical axis 203; LED light source 300; Baffle 400; Main body 500; Circuit board 600; Heat sink 700. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. 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.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution. In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] Reference Figure 1 and Figure 2 An optical system according to a first aspect of the present invention includes a lens 100, a reflector 200, an LED light source 300, and a baffle 400. The reflector 200 is located behind the lens 100 and has a reflective surface with a parabolic or elliptical profile. The reflector 200 has a first focal point 201 and a second focal point 202. The LED light source 300 is located below the reflector 200 and is positioned perpendicular to the optical axis 203 at the first focal point 201. The baffle 400 is located between the reflector 200 and the LED light source 300 and is positioned near the first focal point 201 to block some of the light emitted by the LED light source 300.

[0034] It is understood that the optical system provided in this embodiment of the invention uses a baffle 400 to block part of the light emitted by the LED light source 300, thereby controlling the light distribution falling on the reflector 200. The reflector 200 reflects the light not blocked by the baffle 400 to the lens 100, and then projects a cutoff line and a light pattern that meets the light distribution standard through the lens 100. Compared with the traditional method of setting the baffle 400 at the second focal point 202, this embodiment of the invention sets the baffle 400 near the first focal point 201 and offset it from the second focal point 202, preventing the reflector 200 from concentrating all the energy on the baffle 400, reducing the energy density borne by the baffle 400, reducing the hot spot area on the baffle 400, thereby effectively avoiding the risk of thermal deformation or melting caused by excessive energy concentration, improving the service life of the baffle 400, and reducing the heat resistance requirements of the baffle 400 material, thus reducing manufacturing costs. This embodiment of the invention simplifies the overall structure of the optical system by staggering the arrangement of the baffles 400, which not only meets the light distribution requirements but also makes the structure more compact, reduces manufacturing costs, and facilitates assembly and maintenance.

[0035] It should be noted that, according to some embodiments of this utility model, in addition to being set at the first focal point 201 in a manner perpendicular to the optical axis 203, the LED light source 300 can also be set above or below the first focal point 201 in a manner perpendicular to the optical axis 203. Specifically, the central axis of the LED light source 300 is perpendicular to the optical axis 203, and the LED light source 300 can move along the central axis to adjust its position. The LED light source 300 can also rotate around the central axis to adjust its position, thereby changing the initial distribution state of the light to meet different light distribution requirements.

[0036] It should be further explained that, according to some embodiments of this utility model, in order to meet different light distribution requirements, the central axis of the LED light source 300 can be perpendicular to the optical axis 203, or it can form an angle with the optical axis 203. That is to say, the LED light source 300 is arranged at an angle. The angle can be acute or obtuse. The specific size of the angle can be determined according to actual needs and is not specifically limited here. Similarly, the LED light source 300 can move along the central axis to adjust its position, or the LED light source 300 can rotate around the central axis to adjust its position, thereby changing the initial distribution state of the light to meet different light distribution requirements.

[0037] Furthermore, according to some embodiments of the present invention, the baffle 400 is located above or behind the LED light source 300, so that the position of the baffle 400 can be flexibly adjusted according to different application requirements to control the distribution of light and thus meet different light distribution requirements.

[0038] Furthermore, according to some embodiments of the present invention, in the direction perpendicular to the optical axis 203, the projection of the LED light source 300 coincides with the projection portion of the baffle 400, thereby enabling the baffle 400 to more effectively block unnecessary light while ensuring that sufficient light falls on the reflector 200 to meet the light distribution requirements.

[0039] Furthermore, according to some embodiments of the present invention, the baffle 400 is located above and behind the LED light source 300 and is integrally formed with the reflector 200, thereby simplifying the assembly process, enhancing the overall rigidity and reliability of the system, and reducing manufacturing costs.

[0040] It should be noted that, according to some embodiments of this utility model, depending on different product requirements, the baffle 400 can be integrally formed with the reflector 200 or it can be manufactured separately, thereby facilitating the disassembly and assembly of the baffle 400 for maintenance and updates.

[0041] Furthermore, according to some embodiments of the present invention, the baffle 400 is flat, which helps to form a clearer and straighter cutoff line between light and dark areas.

[0042] Furthermore, according to some embodiments of the present invention, the outer surface of the baffle 400 has a broken or free-form surface, thereby enabling more diverse light patterns to meet the lighting needs of different scenarios.

[0043] Furthermore, according to some embodiments of this utility model, the reflector 200 is ellipsoidal, with the upper half of the reflector 200 ending at the second focal point 202. It is understood that the ellipsoid has two focal points. The LED light source is placed perpendicular to the optical axis 203 at the first focal point 201 of the ellipsoid, and the light emitted by the LED light source 300 converges at the second focal point 202 after reflection. Since the LED light source emits light approximately like a Lambertian light source, the reflector 200 only needs to be the upper half and end at the second focal point 202.

[0044] Reference Figure 3 The vehicle lamp proposed according to this utility model includes the optical system of any of the above embodiments, and further includes a main body 500, a circuit board 600, and a heat sink 700. A lens 100 is connected to the front end of the main body 500, a reflector 200 is connected to the main body 500, the circuit board 600 is mounted on the main body 500 and located below the reflector 200, an LED light source 300 is mounted on the circuit board 600, and the heat sink 700 is connected to the rear end of the main body 500 for heat dissipation of the vehicle lamp, which helps to extend the service life of the vehicle lamp. Since the vehicle lamp adopts all the above technical solutions, it should have the same beneficial effects, and will not be described in detail here.

[0045] The automobile proposed according to this utility model includes the headlights of the above embodiments. Since the automobile adopts all the above technical solutions, it should have the same beneficial effects, and will not be described again here.

[0046] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An optical system, characterized in that, include: lens; A reflector is located behind the lens. The reflector has a reflective surface with a parabolic or elliptical profile. The reflector has a first focal point and a second focal point. An LED light source is located below the reflector, and the LED light source is positioned at the first focal point in a manner perpendicular to the optical axis; A baffle is located between the reflector and the LED light source. The baffle is positioned near the first focal point and can block part of the light emitted by the LED light source.

2. The optical system according to claim 1, characterized in that, The baffle is located above or in front of the LED light source.

3. The optical system according to claim 2, characterized in that, In a direction perpendicular to the optical axis, the projection of the LED light source coincides with the projection portion of the baffle.

4. The optical system according to claim 2, characterized in that, The baffle is located above and behind the LED light source and is integrally formed with the reflector.

5. The optical system according to claim 1, characterized in that, The baffle is straight.

6. The optical system according to claim 1, characterized in that, The outer surface of the baffle has breaks.

7. The optical system according to claim 1, characterized in that, The outer surface of the baffle has a free-form surface.

8. The optical system according to claim 1, characterized in that, The reflector is ellipsoidal, and the upper half of the reflector ends at the second focal point.

9. A vehicle light, characterized in that, The optical system comprising any one of claims 1 to 8 further comprises a main body, a circuit board and a heat sink, wherein the lens is connected to the front end of the main body, the reflector is connected to the main body, the circuit board is mounted on the main body and located below the reflector, the LED light source is mounted on the circuit board, and the heat sink is connected to the rear end of the main body.

10. A car, characterized in that, Including the vehicle lights as described in claim 9.

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