CN118309954A - Optical lens, car light module and car light - Google Patents

Abstract

The application discloses an optical lens, a car lamp module and a car lamp, which relate to the technical field of car lighting. The optical lens, the car lamp module and the car lamp provided by the application can reduce the size of the light emitting surface, thereby reducing the size and weight of the optical lens, and avoiding the burning of parts on the inner side of the car lamp caused by the fact that excessive sunlight passes through the lens to form focusing.

Description

Optical lens, car light module and car light

Technical Field

The application relates to the technical field of vehicle illumination, in particular to an optical lens, a car lamp module and a car lamp.

Background

In recent years, a car lamp and a head lamp module assembled in the car lamp are rapidly developed, and the car lamp is more intelligent and more different in shape from an early halogen lamp to a later hernia lamp and then to a current LED and laser light source. Among various lamp light sources, an LED light source is gaining attention from automobile manufacturers due to its excellent performance and low cost advantages, and along with the development of the LED light source, its light distribution structure is also developing. The lighting system of the LED light source commonly used in the automotive lamp in the prior art generally comprises a light source, a reflecting element, a light shielding plate and an optical lens. The light emitted by the light source is reflected by the reflecting element and then emitted to the light shielding plate, and the light is shielded by the light shielding plate, and then projected by the optical lens to form an illumination light shape with a cut-off line.

In the prior art, an optical lens in an automobile lamp generally adopts a plano-convex lens, wherein a plane is taken as a light incident surface, a convex surface is taken as a light emergent surface, light rays are incident from the light incident surface and are refracted when incident, light rays are diffused again when propagating in the lens and are emergent from the light emergent surface, and the light rays can be continuously diffused when propagating in the lens, so that a larger light emergent surface is required to meet the emergent requirement of the light rays. However, the larger light-emitting surface can make the plano-convex lens larger in size and heavier in weight, and cannot meet the demands for miniaturization and light weight of the vehicle lamp. In addition, the larger size of the light-emitting surface can enable more sunlight to form focusing after passing through the lens, so that parts on the inner side of the car lamp are burnt.

Disclosure of Invention

The application aims to provide an optical lens, a car lamp module and a car lamp, which can reduce the size of a light emitting surface, thereby reducing the size and weight of the optical lens, and avoiding the phenomenon that excessive sunlight passes through the lens to form focusing so as to cause the burning of parts on the inner side of the car lamp.

In one aspect, an embodiment of the present application provides an optical lens, including at least one lens body, where the lens body includes an integrally formed light-in portion, a light-passing portion and a light-out portion, the light-passing portion is in a prismatic table shape with a gradually increasing cross-sectional area, the light-in portion is located on a side with a larger cross-sectional area of the light-passing portion, the light-out portion is located on a side with a smaller cross-sectional area of the light-passing portion, a light-in surface of the light-in portion is convex, a light-out surface of the light-out portion is concave, and a projection area of the light-in surface is larger than a projection area of the light-out surface.

As an implementation manner, the optical lens includes a plurality of lens bodies, a plurality of light incident surfaces are sequentially connected along a set direction, a plurality of light emergent surfaces are connected along the set direction to form a cylindrical surface, and a generatrix of the cylindrical surface is parallel to the set direction.

As an implementation manner, the light incident surfaces are arranged in a matrix and the edges are connected with each other, the light emergent surfaces are connected along a set direction to form a plurality of cylindrical surfaces, and the generatrix of the cylindrical surfaces is parallel to the set direction.

As an implementation, the multiple cylinders are separated from each other.

As an embodiment, the plurality of light incident surfaces are sequentially connected in the set direction, the light emitting surface is a concave surface of revolution, and the plurality of light emitting surfaces are arranged in the set direction and are separated from each other.

As an embodiment, the light incident surfaces are arranged in a matrix and the edges are connected to each other, and the light emergent surfaces are arranged in a matrix and are separated from each other.

As one embodiment, the outer periphery of the optical lens is provided with a fixing member.

As an implementation manner, the gap between the adjacent lens bodies is filled with a light blocking member, and the light blocking member is used for absorbing stray light emitted from the side surfaces of the lens bodies.

As an implementation manner, the light blocking member is a light absorbing plastic light blocking member, and the lens body is a transparent plastic lens.

Another aspect of the embodiments of the present application provides a vehicle lamp module, which includes a light source 300, a reflector disposed on a light emitting side of the light source 300, and the optical lens disposed on an optical path, wherein light emitted by the light source 300 is reflected by the reflector and exits through the optical lens.

In still another aspect, an embodiment of the present application provides a vehicle lamp, including the vehicle lamp module set described above.

The beneficial effects of the embodiment of the application include:

The application provides an optical lens, which comprises at least one lens body, wherein the lens body comprises an integrally formed light inlet part, a light passing part and a light outlet part, the light passing part is in a prismatic table shape with a gradually increased cross section area, the light inlet part is positioned on one side with a larger cross section area of the light passing part, the light outlet part is positioned on one side with a smaller cross section area of the light passing part, the light inlet surface of the light inlet part is outwards convex to form a convex surface, the light outlet surface is inwards concave to form a concave surface, the light can be emitted from the light outlet surface with a small projection area through the converging action of the concave surface, the light energy of the light emitted from the light outlet surface is improved, and the projection area of the light inlet surface is larger than the projection area of the light outlet surface. Under the condition that the size of the light-emitting surface is smaller, excessive sunlight is prevented from forming focusing after passing through the lens through the light-emitting surface, and parts on the inner side of the car lamp are burnt.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an optical lens according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of an optical lens according to an embodiment of the present application;

FIG. 3 is a schematic diagram of another optical lens according to an embodiment of the present application;

Fig. 4 is a schematic light path diagram of a vehicle lamp module according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another vehicle lamp module according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another vehicle lamp module according to an embodiment of the present application;

FIG. 7 is a schematic diagram of another optical lens according to an embodiment of the present application;

FIG. 8 is a second schematic diagram of another optical lens according to the embodiment of the application;

FIG. 9 is a schematic cross-sectional view of still another optical lens according to an embodiment of the present application;

fig. 10 is a light pattern diagram that can be projected by the lamp module according to the embodiment of the present application.

Icon: 100-an optical lens; 110-a lens body; 111-light incident surface; 112-a light-emitting surface; 113-cylinder; 120-fixing piece; 130-a light barrier; 200-mirrors; 300-light source.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The automobile headlamps that use widely at present usually use light source, speculum and optical lens to constitute, and the corresponding cut-off line structure of cut-off line of low beam light shape sets up in the focus area of speculum, and optical lens forms the illumination light shape to the light source formation of image, for this kind of mode of imaging at 25 meters to the nearer thing, usually selects plano-convex lens to realize. In order to form the illumination light shape, the plano-convex lens is generally set to be relatively large in size, so that the whole automobile headlamp occupies relatively large space and is relatively heavy in weight.

The application provides an optical lens 100, as shown in fig. 1 and 2, comprising at least one lens body 110, wherein the lens body 110 comprises an integrally formed light inlet part, a light passing part and a light outlet part, the light passing part is in a prismatic table shape with gradually increased cross-sectional area, the light inlet part is positioned on one side with larger cross-sectional area of the light passing part, the light outlet part is positioned on one side with smaller cross-sectional area of the light passing part, the light inlet surface 111 of the light inlet part is convex outwards to form a convex surface, the light outlet surface 112 of the light outlet part is concave inwards to form a concave surface, and the projection area of the light inlet surface 111 is larger than the projection area of the light outlet surface 112. As shown in fig. 2, when light emitted from a light source irradiates the light incident surface 111, the light incident from the light incident surface 111 is refracted at the light incident surface 111, and is transmitted to the light emergent surface 112 of the light emergent portion through the light passing portion of the lens body 110, the light emergent surface 112 is concave to form a concave surface, and the concave surface has a converging effect on the light, so that the light emergent surface 112 with a large size is not required, that is, the projection area of the light emergent surface 112 is smaller, the light energy of the light emergent surface 112 is improved, and compared with the optical lens in the prior art, the projection area of the light emergent surface 112 is smaller under the condition that the projection area of the light incident surface is the same, and therefore, the size of the optical lens 100 is reduced.

In the prior art, a transparent material such as plastic or glass is generally used as the material of the lens body 110, and the smaller the size of the optical lens 100, the lighter the weight, and the weight of the optical lens 100 is reduced because the size of the optical lens 100 is reduced according to the present application.

In the present application, the specific forms of the contours of the light incident surface 111 and the light emergent surface 112 of the lens body 110 are not limited, and as shown in fig. 1 and 2, the contours of the projection surfaces of the light incident surface 111 and the light emergent surface 112 may be quadrangular, pentagonal, hexagonal, circular, and the like.

The specific form of the convex surface formed by protruding the light incident surface 111 is not particularly limited, as long as the convex surface protrudes outwards to form a smoother curved surface.

In addition, when the solar light irradiates from the outside of the vehicle lamp, that is, when the outside of the optical lens irradiates to the surface of the optical lens 100, the solar light focusing problem exists in the prior art, specifically, the solar light focusing comprises inner focusing and outer focusing, wherein the outer focusing means that the solar light irradiates to the optical lens 100 and is refracted into the optical lens 100 through the outer side surface of the lens, the focusing area is formed at the outer side of the optical lens 100 after being reflected by the inner side surface of the optical lens 100, the focusing means that the focusing area is formed at the inner side of the optical lens 100 after the solar light is refracted twice through the outer side surface and the inner side surface, the inner focusing and the outer focusing enable light to be converged, and the energy is higher, so that parts of the vehicle lamp positioned in the focusing area are ablated and melted. In the application, the light-emitting surface 112 is concaved inwards to form a concave surface, and the projection area of the concave surface is smaller, so that less light is irradiated onto the light-emitting surface 112 by sunlight, and the situation that parts of a focusing area are ablated and melted due to too high energy of the focusing area is avoided.

The optical lens 100 provided by the application comprises at least one lens body 110, wherein the lens body 110 comprises an integrally formed light inlet part, a light passing part and a light outlet part, the light passing part is in a prismatic table shape with gradually increased cross-sectional area, the light inlet part is positioned on one side with larger cross-sectional area of the light passing part, the light outlet part is positioned on one side with smaller cross-sectional area of the light passing part, the light inlet surface 111 of the light inlet part is outwards convex to form a convex surface, the light outlet surface 112 is inwards concave to form a concave surface, the light can be emitted from the light outlet surface 112 with small projection area through the converging action of the concave surface on the light, the light energy of the light emitted through the light outlet surface 112 is improved, the projection area of the light inlet surface 111 is larger than the projection area of the light outlet surface 112.

Alternatively, as shown in fig. 3,4 and 5, the optical lens 100 includes a plurality of lens bodies 110, a plurality of light incident surfaces 111 are sequentially connected along a set direction (e.g. a direction a in fig. 3 and 4 and a direction B in fig. 5), the set direction may be a straight line or a curve set according to a modeling requirement, a plurality of light emergent surfaces 112 are connected along the set direction (e.g. a direction a in fig. 3 and 4 and a direction B in fig. 5) to form a cylindrical surface 113, and a bus bar of the cylindrical surface 113 is parallel to the set direction. It should be noted that the cylindrical surface referred to herein may be a similar cylindrical surface, which has optical properties similar to those of the cylindrical surface.

The light incident surface 111 is a convex surface, the light incident surfaces 111 are sequentially connected along a set direction (such as a direction a in fig. 3 and 4 and a direction B in fig. 5), the light emergent surface 112 is a concave surface, the light emergent surfaces 112 are connected along the set direction (such as a direction a in fig. 3 and 4 and a direction B in fig. 5), for example, the concave surface connection may be formed as a cylindrical surface 113, and a bus of the cylindrical surface 113 is parallel to the set direction (such as a direction a in fig. 3 and 4 and a direction B in fig. 5), so that the light emergent surface 112 collimates the light perpendicular to the set direction, and at this time, the optical lens 100 as a whole has higher intensity and firmness due to the sequential connection of the lens bodies 110 of the optical lens 100.

It should be noted that, when the embodiment of the present application is applied to a vehicle lamp module and a vehicle lamp, as shown in fig. 3 and 4, a reflector 200 is disposed corresponding to each light incident surface 111, a light source 300 is disposed corresponding to the reflector 200, and a light beam emitted by the light source 300 is reflected by the corresponding reflector 200 and then enters the corresponding light incident surface 111.

When the light incident surfaces 111 are connected along a predetermined direction (e.g., direction a in fig. 3) to form the cylindrical surface 113, the optical path of the optical lens 100 is schematically shown in fig. 4, specifically, the reflecting mirror 200 is disposed at one side of the light incident surface 111 and corresponds to the light incident surfaces 111 one by one, the light source 300 is disposed corresponding to the reflecting mirror 200, and the light emitted by the light source 300 is reflected by the reflecting mirror 200, refracted by the light incident surface 111 of the light incident portion, and transmitted to the light emergent surface 112 of the light emergent portion through the light passing portion. The light-emitting surfaces 112 are connected along a set direction (a direction in fig. 3) to form a cylindrical surface 113, and light is emitted from the cylindrical surface 113 and projected on the light distribution screen to form a light shape which is narrower along the set direction (e.g., the a direction in fig. 3) and wider along a direction perpendicular to the set direction, namely, the light shape displayed on the light distribution screen is a light shape which is wide left and right and narrow up and down, and is more suitable for the situation of low beam.

As shown in fig. 5, the light emitted from the light source 300 is reflected by the reflecting mirror 200, refracted by the light incident surface 111 of the light incident portion, and transmitted to the light emergent surface 112 of the light emergent portion through the light passing portion. The light-emitting surfaces 112 are connected along a set direction (direction B in fig. 5) to form a cylindrical surface 113, and light is emitted from the cylindrical surface 113 and projected on the light distribution screen to form a light shape which is narrower along the set direction (direction B in fig. 5) and wider along a direction perpendicular to the set direction, namely, the light shape displayed on the light distribution screen is a light shape which is narrow left and right and wide up and down, and is more suitable for the situation of high beam.

In one implementation manner of the embodiment of the present application, the plurality of light incident surfaces 111 are arranged in a matrix manner and edges are connected to each other, the plurality of light emergent surfaces 112 are connected along a set direction to form the cylindrical surfaces 113, and bus bars of the cylindrical surfaces 113 are parallel to the set direction, and the set direction is, for example, a direction of a matrix column, and the number of the cylindrical surfaces 113 is the same as or different from the number of matrix rows.

When the light incident surfaces 111 are arranged in a matrix, the light emergent surfaces 112 are connected to form a plurality of cylindrical surfaces 113, and the cylindrical surfaces 113 respectively collect the light incident on the light incident surfaces 111 corresponding to the cylindrical surfaces 113.

Optionally, the plurality of cylindrical surfaces 113 are separated from each other. In order to further reduce the total surface area of the light-emitting surface 112, a plurality of cylindrical surfaces 113 are provided separately from each other.

In one implementation manner of the embodiment of the present application, the plurality of light incident surfaces 111 are sequentially connected along the set direction, the plurality of light emergent surfaces 112 corresponding to the light incident surfaces 111 are concave surfaces, preferably concave surfaces of revolution, and the plurality of concave surfaces of revolution are sequentially arranged along the set direction and are separated from each other.

The concave surface of revolution is a spherical surface or a surface similar to the spherical surface. When the light-emitting surface 112 is a concave-curved surface, the concave-curved surface converges the light rays incident on the corresponding light-incident surface 111 in each direction, so as to increase the light energy of the light emitted from the light-emitting surface 112, and the size of the light-emitting surface 112 is reduced, so that the volume of the optical lens 100 is reduced.

Alternatively, as shown in fig. 6, a plurality of light incident surfaces 111 are arranged in a matrix and have edges connected to each other, the light emergent surface 112 is a curved surface of revolution, and the light emergent surfaces 112 are separated from each other.

The concave surface of revolution converges light rays to increase the light energy of the outgoing light, and the light outgoing surface 112 is small in size to reduce the size of the optical lens 100. In addition, since the plurality of light incident surfaces 111 are correspondingly provided with the reflecting mirrors 200, and the reflecting mirrors 200 are correspondingly provided with different light sources 300, different light patterns can be formed after the light shapes emitted by the light emitting surfaces 112 are overlapped by controlling the on-off states of the light sources 300, so that the diversity of the irradiation effect of the vehicle lamp is improved.

In addition, the projected area of the concave surface of revolution is small, and when sunlight irradiates the lens body 110 from the light-emitting surface 112, a focusing area per se is formed for each concave surface of revolution, so that the optical lens can form a plurality of focusing areas, because the energy density of the light energy is positively correlated with the projected area, the energy of the focusing area is greatly reduced, and even if inner focusing is formed inside the lens or outer focusing is formed outside the lens, the energy of the focusing area is not too high, which is insufficient to ablate and melt the components of the focusing area.

It should be noted that the structure of the optical lens 100 arranged in a matrix of three rows and three columns in fig. 6 is only one form of the present application, and is not limited to the number of rows and columns of the structure of the optical lens 100 arranged in a matrix of the present application, and those skilled in the art may specifically set the structure according to the specific situation.

In one possible implementation of the embodiment of the present application, as shown in fig. 7 and 8, the optical lens 100 is provided with a fixing member 120 at the outer periphery. In order to facilitate transportation or installation of the optical lens 100 and improve structural firmness of the optical lens 100, the embodiment of the present application provides the fixing member 120 at the outer circumference of the optical lens 100.

Optionally, as shown in fig. 9, gaps between adjacent lens bodies 110 are filled with light blocking members 130, and the light blocking members 130 are used for absorbing stray light emitted from the side surfaces of the lens bodies 110.

In order to avoid stray light entering the lens body 110 or forming a light shape along with the influence of the emergent light, the aperture between adjacent lens bodies 110 in the embodiment of the present application is filled with the light blocking member 130, and the light blocking member 130 is used for absorbing the stray light emergent from the side surface of the lens body 110.

In one implementation of the embodiment of the present application, the light blocking member 130 is a light absorbing plastic light blocking member, and the lens body 110 is a transparent plastic lens.

In general, the optical lens 100 is made of a transparent material such as plastic, glass, etc., where the plastic has a smaller density, so that the quality of the optical lens 100 can be reduced, so the optical lens 100 according to the embodiment of the present application may be a transparent plastic lens, and of course, the material of the plastic is not limited to the material of the lens body 110, and those skilled in the art can select other materials capable of guiding light according to practical situations.

In order to improve the connection fastness of the light blocking member 130 and the lens body 110, the light blocking member 130 is arranged as a light absorbing plastic light blocking member, so that the light blocking member 130 and the lens body 110 are made of the same material, and the light blocking member 130 needs to be different from the lens body 110 in color because the light blocking member 130 needs to absorb stray light, and in addition, in order to improve the light absorbing effect of the light blocking member 130, the light blocking member 130 can be arranged as black. And the light blocking member can also be integrally injection molded with the lens body 110, and can adopt a double-shot injection molding or insert injection molding mode.

In addition, the fixing member 120 may be made of light-absorbing plastic, and is integrally injection-molded with the light blocking member 130, so that the process of manufacturing the optical lens 100 can be reduced, and in addition, the fixing member 120 can fix the lens body 110 on one hand, and can absorb stray light irradiated onto the fixing member 120 on the other hand, thereby avoiding influencing the light-emitting shape.

The embodiment of the application also discloses a car lamp module, which comprises a light source 300, a reflector 200 arranged on the light emitting side of the light source 300 and the optical lens 100 arranged on the light path, wherein the light emitted by the light source 300 is reflected by the reflector 200 and emitted through the optical lens 100.

The dipped beam pattern formed by the lamp module disclosed by the embodiment of the application is shown in fig. 10. As can be seen from fig. 10, the dipped beam formed by the lamp module according to the embodiment of the application has a distinct cut-off line and a uniform light shape.

The embodiment of the application also discloses a car lamp, which comprises the car lamp module.

The lamp module and lamp of the present application have the same structure and advantages as the optical lens 100 of the previous embodiments. The structure and the advantages of the optical lens 100 are described in detail in the foregoing embodiments, and are not described herein.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (11)

1. The utility model provides an optical lens, its characterized in that includes at least one lens body, the lens body includes integrated into one piece's income light portion, light-passing portion and light-emitting portion, light-passing portion is the prismatic table shape that the cross-sectional area increases gradually, it is located to go into light portion the great one side of light-passing portion cross-sectional area, light-emitting portion is located the less one side of light-passing portion cross-sectional area, the income plain noodles evagination of income light portion forms the convex surface, the concave surface is formed to the plain noodles indent of light-emitting portion, the projected area of income plain noodles is greater than the projected area of plain noodles.

2. The optical lens according to claim 1, wherein the optical lens comprises a plurality of lens bodies, a plurality of light incident surfaces are sequentially connected along a set direction, a plurality of light emergent surfaces are connected along the set direction to form a cylindrical surface, and a generatrix of the cylindrical surface is parallel to the set direction.

3. The optical lens of claim 2, wherein a plurality of the light incident surfaces are arranged in a matrix and are connected to each other at edges, the light emergent surfaces are connected along a set direction to form a plurality of cylindrical surfaces, and bus bars of the cylindrical surfaces are parallel to the set direction.

4. An optical lens as claimed in claim 3, wherein a plurality of said cylindrical surfaces are separated from each other.

5. The optical lens of claim 1, wherein the light incident surfaces are sequentially connected in a predetermined direction, the light emergent surface is a curved surface of revolution, and the light emergent surfaces are arranged in the predetermined direction and are separated from each other.

6. The optical lens of claim 5, wherein a plurality of the light incident surfaces are arranged in a matrix and are connected to each other at edges, and a plurality of the light emergent surfaces are arranged in a matrix and are separated from each other.

7. An optical lens according to any one of claims 2-6, characterized in that the outer circumference of the optical lens is provided with a fixing member.

8. An optical lens as claimed in any one of claims 4 to 6, wherein the gap between adjacent lens bodies is filled with a barrier for absorbing stray light exiting from the sides of the lens bodies.

9. The optical lens of claim 8 wherein the barrier is a light absorbing plastic barrier and the lens body is a transparent plastic lens.

10. A vehicle lamp module, comprising a light source, a reflector disposed on the light emitting side of the light source, and the optical lens according to any one of claims 1-9 disposed on the light path, wherein the light emitted by the light source is reflected by the reflector and exits through the optical lens.

11. A vehicle lamp comprising the vehicle lamp module of claim 10.