CN219510649U - Lighting device and car light - Google Patents

Abstract

The utility model provides a lighting device and a car lamp, which relate to the technical field of car lamps, and the technical field of car lamps is that an optical lens in the lighting device is improved, so that the optical lens is provided with a first total reflection surface, the first total reflection surface can be used for replacing a light incident surface in the existing optical lens to realize one-way collimation and simultaneously carry out total reflection on light rays of a light source, and therefore, the position of the light incident surface of the optical lens can be changed while the lighting effect is ensured, and components matched with the optical lens are not required to be arranged along the front-back direction, but can be arranged along other directions perpendicular to the front-back direction, so that the oversize of the lighting device in the front-back direction can be avoided, and the limitation imposed on the arrangement of the lighting device is reduced.

Description

Lighting device and car light

Technical Field

The utility model relates to the technical field of car lamps, in particular to a lighting device and a car lamp.

Background

With the development of society and economy, the automobile industry is also developed, and with the continuous development of automobile lighting technology, more requirements are also put on the functions of the automobile lamp. In an illumination device for realizing a lamp illumination function, an optical element having a collimation function is generally provided to obtain approximately parallel outgoing light rays, thereby obtaining a better illumination effect.

The existing optical lens with the collimation function is generally provided with a light inlet part and a light outlet part which are positioned on two opposite sides of the optical lens, the light inlet part can realize unidirectional collimation in the horizontal direction, the light outlet part can realize unidirectional collimation in the vertical direction, and other parts which are matched with the optical lens are limited to be distributed on two opposite sides of the optical lens, so that an optical system which is arranged front and back is formed, the size of the whole lighting device in the front and back direction is overlarge, and the arrangement of the lighting device and a car lamp is not facilitated.

Disclosure of Invention

The present utility model aims to solve the above-described drawbacks of the prior art and to provide a lighting device and a vehicle lamp.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the utility model is as follows:

in one aspect of the embodiments of the present utility model, an illumination device is provided, including a light source and an optical lens disposed at a light emitting side of the light source, where the optical lens has a light incident surface, a first total reflection surface capable of collimating light along a first direction, and a light emitting surface capable of collimating light along a second direction, where the first direction and the second direction are perpendicular to each other or approximately perpendicular to each other, and light emitted from the light source incident through the light incident surface is reflected by the first total reflection surface to the light emitting surface for collimation and emission.

Optionally, a section line of the first total reflection surface in the first direction is a curve, and a section line of the first total reflection surface in the second direction is a straight line or an approximate straight line.

Optionally, the surface shape of the first total reflection surface is a cylindrical surface or a similar cylindrical surface.

Optionally, the optical lens further has a primary reflecting surface located between the light incident surface and the first total reflecting surface along the light path direction, and the light emitted from the light source incident through the light incident surface is reflected to the first total reflecting surface through the primary reflecting surface.

Optionally, the primary reflecting surface is a total reflecting surface or a reflecting mirror surface with a reflecting layer.

Optionally, the lighting device further includes a primary reflector having a primary reflecting surface, the primary reflector being located between the light source and the optical lens, and the primary reflector being configured to reflect light emitted by the light source to the light incident surface of the optical lens.

Optionally, the lighting device further comprises a cut-off line structure located at the light emitting side of the light source, the cut-off line structure being located at or near the focal point of the optical lens, the cut-off line structure being used for forming a light emitting shape having a cut-off line.

Optionally, when the lighting device further comprises a primary reflecting surface, the cut-off line structure is arranged at or near a boundary of the primary reflecting surface on a side close to the light source.

Optionally, the optical lens further has at least one second total reflection surface located on the optical path, and the at least one second total reflection surface is used for adjusting the optical path of the light emitted by the light source in the optical lens.

Optionally, the primary reflecting surface has a parabolic, paraboloid-like, ellipsoidal or ellipsoid-like surface.

In another aspect of the embodiments of the present utility model, there is provided a vehicle lamp including any one of the above-described lighting devices.

The beneficial effects of the utility model include:

the utility model provides a lighting device and a car lamp, which are characterized in that an optical lens in the lighting device is improved, so that the optical lens is provided with a first total reflection surface, the first total reflection surface can be used for replacing a light incident surface in the existing optical lens to realize unidirectional collimation and simultaneously carrying out total reflection on light rays emitted by a light source, the position of the light incident surface of the optical lens can be changed while the lighting effect is ensured, and components matched with the optical lens are not required to be arranged along the front-back direction, but can be also arranged along other directions such as the vertical front-back direction, thereby avoiding the oversized size of the lighting device in the front-back direction and reducing the limitation imposed on the arrangement of the lighting device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, 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 utility model 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 diagram of an optical lens according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of an optical lens according to the present utility model;

FIG. 3 is a third schematic diagram of an optical lens according to an embodiment of the utility model;

FIG. 4 is a schematic diagram of an optical lens according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a lighting device according to an embodiment of the present utility model;

FIG. 6 is a second schematic diagram of a lighting device according to an embodiment of the present utility model;

fig. 7 is a schematic light path diagram of an illumination device according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of another lighting device according to an embodiment of the present utility model;

FIG. 9 is a second schematic diagram of another lighting device according to the embodiment of the present utility model;

FIG. 10 is a schematic view of an optical path of another lighting device according to an embodiment of the present utility model;

FIG. 11 is a schematic diagram of another optical lens according to an embodiment of the present utility model;

FIG. 12 is a schematic view of an optical path of another lighting device according to an embodiment of the present utility model;

FIG. 13 is a schematic view of a structure of another optical lens according to an embodiment of the present utility model;

fig. 14 is a schematic view of an optical path of another lighting device according to an embodiment of the present utility model;

fig. 15 is a schematic structural view of an illumination device according to an embodiment of the present utility model, in which an optical lens and a primary reflecting surface are separately disposed;

fig. 16 is a schematic structural diagram of a lighting device according to an embodiment of the present utility model, including a low beam module and a high beam module;

fig. 17 is a schematic view of a low beam light pattern formed when the lighting device according to the embodiment of the utility model is used as a low beam module.

Icon: 10-an illumination device; 11-high beam module; 12-a low beam module; 100-an optical lens; 110-a light incident surface; 120-a first total reflection surface; 130-a light-emitting surface; 140-cut-off line structure; 141-focal position; 150—a primary reflecting surface; 160-a second total reflection surface; 200-a heat sink; 210-a circuit board; 220-light source.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. It should be noted that, under the condition of no conflict, the features of the embodiments of the present utility model may be combined with each other, and the combined embodiments still fall within the protection scope of the present utility model.

In the description of the present utility model, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, 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 utility model will be understood in specific cases by those of ordinary skill in the art.

It should be understood that, for convenience in describing the present utility model and simplifying the description, the terms "front and rear" refer to the front and rear directions of the lighting device in the light-emitting direction, the terms "left and right" refer to the left and right directions of the lighting device itself, and the terms "up and down" refer to the up and down directions of the lighting device itself, which are generally substantially the same as the front, rear, left and right up and down directions of the vehicle; the terms are based on the orientation or positional relationship shown in the drawings and do not indicate or imply that the device or element in question must have a particular orientation, be constructed and operate in a particular orientation and therefore should not be construed as limiting the utility model; moreover, the azimuthal terminology of the lighting apparatus of the present utility model should be understood in connection with the actual installation state.

In the present utility model, the light shape refers to the projected shape of the light of the lamp projected on the vertical plane light distribution screen at a position 25m from the front of the vehicle, and the cut-off line refers to the cut-off line where the light is projected on the light distribution screen, and the light and shade perceived visually changes significantly. The main low beam light shape is the central area light shape of the low beam light shape, the illuminance is high, the auxiliary low beam light shape is the broadening area light shape of the low beam light shape, and the left and right irradiation ranges of the low beam light shape meet the requirements. The total reflection surface is a reflection surface that can cause light rays incident on the reflection surface to be totally reflected as much as possible.

In one aspect of the embodiments of the present utility model, an illumination device is provided, including a light source and an optical lens disposed at a light emitting side of the light source, where the optical lens is an integrally formed piece made of a transparent material, and the optical lens can perform bidirectional collimation (that is, perform collimation on light emitted by the light source along two directions perpendicular to each other or approximately perpendicular to each other) on light emitted by the light source, so that collected approximately parallel emergent light can be obtained, and a better illumination effect is obtained. Wherein, approximately vertical means that the included angle between two directions is 90 degrees plus or minus 10 degrees.

Referring to fig. 1 and 2, the optical lens 100 has a light incident surface 110, a first total reflection surface 120 and a light emergent surface 130 sequentially arranged along a light path, wherein the first total reflection surface 120 can achieve a function of collimating light emitted from the light source 220 along a first direction, the light emergent surface 130 can achieve a function of collimating light emitted from the light source 220 along a second direction, and the first direction and the second direction are two directions perpendicular or approximately perpendicular to each other, so that a bidirectional collimation function of the optical lens 100 is achieved through the first total reflection surface 120 and the light emergent surface 130, thereby obtaining a concentrated approximately parallel emergent light, and obtaining a better illumination effect.

In practical use, the light emitted by the light source 220 is incident on the optical lens 100 through the light incident surface 110 of the optical lens 100 and propagates to the first total reflection surface 120, the first total reflection surface 120 can not only collimate the incident light along the first direction, but also make the incident light totally reflect at the first total reflection surface 120, thereby reducing the light loss, the light emitted by the light source 220 propagates to the light emergent surface 130 after being totally reflected at the first total reflection surface 120, and the light emitted by the light emergent surface 130 is collimated along the second direction, so that the light emitted by the light source 220 is finally emitted by the light emergent surface 130 after being collimated along the first direction and the second direction, and forms the light emergent shape of the lighting device 10.

Since the first total reflection surface 120 can implement collimation along the first direction, so that the first total reflection surface 120 can replace the light incident surface that implements unidirectional collimation in the existing optical lens, on the basis of this, in view of the total reflection function of the first total reflection surface 120, the position of the light incident surface 110 on the optical lens 100 can be changed, that is, the position of the light incident surface 110 relative to the light emergent surface 130 is changed, so that the light incident surface 110 and the light emergent surface 130 no longer have to be located on opposite sides of the optical lens 100, in other words, due to the total reflection function of the first total reflection surface 120, the light incident direction can be changed, so that the components arranged in cooperation with the optical lens 100 do not have to be arranged along the front-rear direction, but can also be arranged along other directions except the front-rear direction, so that, for the direction shown in fig. 1 is borrowed for the convenience of understanding, the light must be incident into the optical lens along the y direction (front-rear direction), and thus, other components must cooperate with the optical lens along the y direction, and the formed lighting device 10 as a whole has a large size in the y direction, and thus the lighting device is more limited. In contrast, in the optical lens 100 of the present utility model as shown in fig. 1 and 2, due to the presence of the first total reflection surface 120, the position of the light incident surface 110 can be changed, so that the light incident surface 110 is located at the bottom surface of the optical lens 100, and therefore, during arrangement, the component located at the light emitting side of the optical lens 100 and the optical lens 100 can be arranged along the y direction, and the component located at the light incident side of the optical lens 100 and the optical lens 100 can be arranged along the z direction, thereby, the oversized dimension of the lighting device 10 in the y direction can be avoided.

It should be noted that, the first direction may be a horizontal direction, and the second direction may be a vertical direction; of course, in other embodiments, the first direction may also be a vertical direction and the second direction may be a horizontal direction.

Alternatively, since the first total reflection surface 120 can achieve collimation of light in the first direction, that is, unidirectional collimation, it can be understood that: as shown in fig. 1, when the first direction is the x direction and the second direction is the z direction, the first total reflection surface 120 has a curved line, more specifically, a convex curve (the convex finger in this case is convex with respect to the optical lens 100), so that the incident light can be converged, and a certain collimation effect can be provided for the divergent light, and the first total reflection surface 120 has a straight line or an approximate straight line as the sectional line in the second direction, so that the first total reflection surface 120 does not have a collimation effect for the light in the second direction, and therefore, the first total reflection surface 120 can perform a unidirectional collimation effect for the light emitted from the light source 220 in the first direction.

Similarly, since the light emitting surface 130 can collimate the light emitted by the light source 220 in the second direction, that is, one-way collimation, it can be understood that: as shown in fig. 1, when the first direction is the x direction and the second direction is the z direction, the cross section of the light emitting surface 130 in the second direction is a curve, more specifically, a convex curve (the convex finger herein is convex with respect to the optical lens 100), so that the incident light is converged, but only the light is refracted at the light emitting surface 130 at this time, so that the converging means that the light has a larger deflection degree, and can also have a certain collimation effect on the divergent light, and the cross section of the light emitting surface 130 in the first direction is a straight line or an approximate straight line, so that the deflection capability of the light emitting surface 130 on the light in the first direction is far less than the deflection capability of the light in the second direction, so that the light emitting surface 130 does not have or basically does not have the capability of changing the deflection degree of the light, and at the same time does not have the collimation effect on the light in the first direction, i.e. the light is divergent in the first direction, so that the light emitting surface 130 can have a unidirectional collimation effect on the light emitted by the light source 220 in the second direction.

Alternatively, as shown in fig. 1 to 16, the surface shape of the first total reflection surface 120 is a cylindrical surface or a quasi-cylindrical surface. For ease of understanding, the formation of the first total reflection surface 120 may be considered to be obtained by unidirectional stretching a curve, specifically: as shown in fig. 1, curve b is uniaxially stretched in a stretching direction a to form a cylinder or cylinder-like surface. In addition, it should be understood that, in order to ensure that the light emitted by the light source 220 is totally reflected on the first total reflection surface 120, the angle between the normal line at any point on the first total reflection surface 120 and the incident light satisfies the law of total reflection. The light emitting surface 130 may be formed by referring to the first total reflection surface 120, and the difference is that the curve stretching direction is different.

Alternatively, a primary reflecting element may be further disposed in the present utility model, and the light source 220 may be located at or near the focal point of the primary reflecting element, so that the primary reflecting element and the first fully reflecting surface 120 may be arranged in a non-front-rear direction in view of the effect of the first fully reflecting surface 120, thereby avoiding the problem of oversized lighting device 10 in the front-rear direction. The primary reflection element can be used for primary modulation of the light emitted by the light source 220, so as to obtain better illumination effect. When the primary reflecting element is arranged, the primary reflecting element and the optical lens 100 can be integrally arranged, so that on one hand, the volume of the lighting device 10 can be effectively reduced, on the other hand, the integrally arranged form can effectively save the dimming step of the primary reflecting element in the light distribution process, and on the other hand, the integrally arranged form can also enable light to enter light once (the light entering surface 110 of the optical lens 100 enters light) and exit light once (the light exiting surface 130 of the optical lens 100 exits light), thereby effectively reducing light loss and improving the performance of the lighting device 10. Of course, in other embodiments, the primary reflecting element may be provided separately from the optical lens 100, so that the difficulty in manufacturing the optical lens 100 can be reduced and the yield of the optical lens 100 can be improved. The form of the integrated arrangement and the separate arrangement will be described separately below with reference to the drawings.

When the primary reflecting element is integrally provided with the optical lens 100, it can be understood that the primary reflecting surface 150 is provided on the optical lens 100 for realizing the function of primary modulation. For example:

in one embodiment, as shown in fig. 3 and 4, the optical lens 100 is shown to have a primary reflecting surface 150, and the primary reflecting surface 150 is located between the light incident surface 110 and the first total reflecting surface 120 along the optical path direction, and the primary reflecting surface 150 is disposed closer to the light emitting surface 130 than the light incident surface 110.

Correspondingly, the light source 220 is located on one side of the light incident surface 110 of the optical lens 100, as shown in fig. 5, 6 and 7, and the light source 220 is disposed on one side of the light incident surface 110 of the optical lens 100, and the light source 220 may be located at a focal position or a position near the focal point of the primary reflecting surface 150. Thus, as shown in fig. 7, the primary reflecting surface 150 and the first total reflecting surface 120 can be arranged in the up-down direction by the first total reflecting surface 120, so that the illumination device 10 can be prevented from being oversized in the front-rear direction.

In addition, a circuit board 210 carrying the light sources 220 may also be provided. In order to improve the heat dissipation of the light source 220, a heat sink 200 may be disposed on a side of the circuit board 210 far from the light source 220, so that the heat sink 200 can effectively dissipate the heat of the light source 220, and the type of the light source 220, the structure and the material of the heat sink 200 are not limited.

As shown in fig. 7, the light path of the light emitted by the light source 220 when the lighting device 10 is in operation in this embodiment is shown: the light emitted from the light source 220 is incident into the optical lens 100 through the light incident surface 110 of the optical lens 100, propagates to the primary reflecting surface 150, is reflected to the first total reflecting surface 120, propagates to the light emergent surface 130 after being subjected to total reflection and unidirectional collimation in the first total reflecting surface 120, and is then emitted to form the light emergent shape of the lighting device 10 after being subjected to unidirectional collimation in the other direction by the light emergent surface 130, so that approximately parallel emergent light is obtained, and a better lighting effect is obtained.

In another embodiment, as shown in fig. 8, 9 and 10, it is also shown that the optical lens 100 has a primary reflection surface 150, and the primary reflection surface 150 is located between the light incident surface 110 and the first total reflection surface 120 along the optical path direction, differing from the previous embodiment in that: the primary reflecting surface 150 is disposed farther from the light emitting surface 130 than the light incident surface 110, so that the light source 220, the circuit board 210, the heat sink 200, and the like can be fully disposed using the space under the optical lens 100, thereby further reducing the volume of the lighting device 10.

As shown in fig. 10, the light path of the light emitted by the light source 220 when the lighting device 10 is in operation in this embodiment is shown: light rays emitted from the light source 220 are incident into the optical lens 100 through the light incident surface 110 of the optical lens 100, are transmitted to the primary reflecting surface 150, are reflected to the first total reflecting surface 120, are transmitted to the light emitting surface 130 after being subjected to total reflection and unidirectional collimation on the first total reflecting surface 120, and are emitted to form an emergent light shape of the lighting device 10 after being subjected to unidirectional collimation on the light rays of the light source 220 in the other direction by the light emitting surface 130, so that approximately parallel emergent light rays are obtained, and a better lighting effect is obtained.

As can be seen from the embodiments shown in fig. 7 and 10, the position of the primary reflecting surface 150 can be flexibly selected according to the requirements of the lighting device 10 during installation, so that the lighting device 10 can have different structural configurations to meet different arrangement requirements.

In still another embodiment, as shown in fig. 11 and 12, it is also shown that the optical lens 100 has a primary reflecting surface 150, and the primary reflecting surface 150 is located between the light incident surface 110 and the first total reflecting surface 120 in the optical path direction, differing from the previous embodiment in that: a second total reflection surface 160 is further added between the primary reflection surface 150 and the first total reflection surface 120, and the optical path of the light inside the optical lens 100 can be changed through the second total reflection surface 160, so that the structural form of the optical lens 100 can be conveniently changed.

As shown in fig. 12, the light path of the light emitted by the light source 220 when the lighting device 10 is in operation in this embodiment is shown: light rays emitted from the light source 220 are incident through the light incident surface 110 of the optical lens 100, are transmitted to the primary reflecting surface 150, are reflected to the second total reflecting surface 160, are reflected by the second total reflecting surface 160, are incident to the first total reflecting surface 120, are transmitted to the light emitting surface 130 after being subjected to total reflection and unidirectional collimation by the first total reflecting surface 120, and are emitted to form an emergent light shape of the lighting device 10 after being subjected to unidirectional collimation in the other direction by the light emitting surface 130, so that approximately parallel emergent light rays are obtained, and a better lighting effect is obtained.

In still another embodiment, as shown in fig. 13 and 14, the optical lens 100 is also shown to have a primary reflecting surface 150, and the primary reflecting surface 150 is located between the light incident surface 110 and the first total reflecting surface 120 along the optical path direction, and a second total reflecting surface 160 is added between the primary reflecting surface 150 and the first total reflecting surface 120, which is different from the previous embodiment in that: a second total reflection surface 160 is further added between the first total reflection surface 120 and the light exit surface 130, and the optical path inside the optical lens 100 can be changed through the two second total reflection surfaces 160, so that the structural form of the optical lens 100 can be conveniently changed, as shown in fig. 13 and 14, the bottom surface c of the optical lens 100 is a plane, thereby reducing the difficulty in processing and manufacturing the optical lens 100 and improving the yield.

As shown in fig. 14, the light path of the light emitted by the light source 220 when the lighting device 10 is in operation in this embodiment is shown: the light emitted from the light source 220 is incident into the optical lens 100 through the light incident surface 110 of the optical lens 100, propagates to the primary reflecting surface 150, is reflected to the second total reflecting surface 160, is reflected by the second total reflecting surface 160, then enters and is emitted to the first total reflecting surface 120, is reflected by the first total reflecting surface 120 and is unidirectionally collimated, propagates to the other second total reflecting surface 160, is reflected by the other second total reflecting surface, propagates to the light emergent surface 130, and is emitted to form the light emergent shape of the lighting device 10 after being unidirectionally collimated by the light emergent surface 130 in the other direction, thereby obtaining approximately parallel emergent light and obtaining better lighting effect.

Alternatively, as shown in fig. 3 to 14, the primary reflecting surface 150 has a parabolic, paraboloid-like, ellipsoidal or ellipsoid-like surface, so that the light of the light source 220 can be modulated primarily by the primary reflecting surface 150, so that the light of the light source 220 reflected by the primary reflecting surface 150 can be irradiated to the first total reflecting surface 120 or the second total reflecting surface 160 in a nearly parallel light, thereby improving the lighting effect of the lighting device 10.

Alternatively, as shown in fig. 3 to 14, in the embodiment in which the optical lens 100 has the primary reflecting surface 150, that is, the primary reflecting element is integrally provided with the optical lens 100, the primary reflecting surface 150 may be a total reflecting surface or a reflecting mirror surface having a reflecting layer, so that light can be modulated by using the primary reflecting surface 150 while light loss can be avoided. The total reflection surface means that the light emitted by the light source 220 is reflected by total reflection when the light is incident on the total reflection surface; the reflecting mirror surface having the reflecting layer means that the reflecting layer is coated on a designated area of the outer surface of the optical lens 100, and thus, when the light emitted from the light source 220 is incident on the reflecting mirror surface having the reflecting layer, the light is reflected by specular reflection.

Alternatively, as shown in fig. 3 to 14, in an embodiment in which the optical lens 100 has a primary reflecting surface 150, i.e. the primary reflecting element is integrally provided with the optical lens 100, the optical lens 100 may be made to integrate the cut-off line structure 140, i.e. the cut-off line structure 140 is integrally provided with the optical lens 100, in particular: as shown in fig. 3 to 14, the cut-off line structure 140 is disposed near a boundary or a boundary of the primary reflecting surface 150 near the light source 220, and the cut-off line structure 140 can correspondingly make the light-emitting shape of the lighting device 10 have a cut-off line, so as to meet the standard of the light shape. The cut-off line structure 140 may be located at a focal point of the optical lens 100, for example, as shown in fig. 3 and 4, and shows that parallel light is incident on the optical lens 100 from the light-emitting surface 130, and is reflected by the first total reflection surface 120 and then converged at a point, that is, the focal point position 141 of the optical lens 100, and the cut-off line structure 140 may be located near the point, so that when the light of the light source 220 irradiates the cut-off line structure 140, an image formed here can be emitted through the optical lens 100 to form an image on a light distribution screen, that is, a cut-off line of an emitted light shape is formed. Wherein, the vicinity of the boundary refers to the range of 2mm around the boundary.

When the primary reflecting element is disposed separately from the optical lens 100, it can be understood that a primary reflecting mirror is separately disposed outside the optical lens 100, so as to reflect the light emitted from the light source 220 to the light incident surface 110 of the optical lens 100 and implement the primary modulation function. For example:

as shown in fig. 15, a primary reflecting mirror is disposed between the light source 220 and the optical lens 100, and under the action of the first total reflection surface 120, the light incident surface 110 of the optical lens 100 can be located at the bottom surface, and the primary reflecting mirror is disposed below the optical lens 100, so that an arrangement in the up-down direction is formed with the first total reflection surface 120, and thus, an excessive size of the lighting device 10 in the front-rear direction can be avoided.

Similarly, in such an embodiment, a circuit board 210 carrying the light sources 220 may also be provided. In order to improve the heat dissipation of the light source 220, a heat sink 200 may be disposed on a side of the circuit board 210 far from the light source 220, so that the heat sink 200 can effectively dissipate the heat of the light source 220, and the type of the light source 220, the structure and the material of the heat sink 200 are not limited.

The light path (not shown) of the light emitted by the light source 220 when the lighting device 10 is in operation in this embodiment: the light source 220 emits light, and the light is incident to the primary reflector, is incident through the light incident surface 110 of the optical lens 100 under the reflection action of the primary reflector, propagates to the first total reflection surface 120, propagates to the light emergent surface 130 after undergoing total reflection and unidirectional collimation on the first total reflection surface 120, and is emitted to form the light emergent shape of the lighting device 10 after unidirectional collimation on the light from the light emergent surface 130 in the other direction, so that approximately parallel emergent light is obtained, and a better lighting effect is obtained.

Of course, in this embodiment, at least one second total reflection surface 160 may be added to the inside of the optical lens 100, so that the optical path inside the optical lens 100 can be changed, so that the optical lens 100 has a specific external shape, and the layout requirements of other components are satisfied.

Optionally, as shown in fig. 15, the primary reflecting surface 150 of the primary reflecting mirror is a paraboloid, a paraboloid-like surface, an ellipsoid or an ellipsoid-like surface, where the paraboloid-like surface is a curved surface similar to the paraboloid, and the ellipsoid-like surface is a curved surface similar to the ellipsoid, and has similar optical performance, so that the light of the light source 220 can be modulated primarily by the primary reflecting surface 150, so that the light of the light source 220 reflected by the primary reflecting surface 150 can irradiate the first total reflecting surface 120 or the second total reflecting surface 160 with light close to parallel, thereby improving the lighting effect of the lighting device 10.

Alternatively, as shown in fig. 15, in an embodiment in which the primary reflecting element is provided separately from the optical lens 100, the primary reflecting mirror may be integrated with the cut-off line structure 140, i.e. the cut-off line structure 140 is provided integrally with the primary reflecting mirror, in particular: as shown in fig. 15, the cut-off line structure 140 is disposed at the boundary or the vicinity of the boundary of the primary reflecting surface 150 of the primary reflecting mirror near the side of the light source 220, and the cut-off line structure 140 can correspondingly make the light-emitting shape of the lighting device 10 have a cut-off line, so as to meet the standard of the light shape. The cut-off line structure 140 may be located at a focal point of the optical lens 100, for example, as shown in fig. 1 and 2, and illustrates a point where parallel light enters the optical lens 100 from the light exit surface 130, is reflected by the first total reflection surface 120 and is converged outside the optical lens 100, and the point is a focal point position 141 of the optical lens 100, and the cut-off line structure 140 may be located at or near the point, so that when the light of the light source 220 irradiates the cut-off line structure 140, an image formed here may be emitted through the optical lens 100 and imaged on a light distribution screen, that is, a cut-off line of an emergent light shape is formed.

Of course, as shown in fig. 1 and 2, in other embodiments, the cutoff structure 140 may not be integrally provided with the optical lens 100 or the primary mirror, and may be formed of a separate light blocking member or a light blocking plate or a condenser, which is not limited by the present utility model. When set, it is desirable to have the cut-off line structure 140 at or near the focal point 141 of the optical lens 100 as shown in fig. 1 or 2. Wherein, near the focus refers to the range of 2mm around the focus.

It should be understood that the lighting device 10 of the present utility model may include a low beam module 12 for forming a low beam shape, and the lighting device 10 as shown in fig. 5-15 may be used to form a low beam shape. Of course, the lighting device 10 of the present utility model may also include a high beam module 11 for forming a high beam shape, and the lighting device 10 shown in fig. 5 to 15 may be used for forming a high beam shape. Alternatively, the lighting device 10 of the present utility model includes both a low beam module 12 for forming a low beam shape and a high beam module 11 for forming a high beam shape, for example, as shown in fig. 16, the dashed line in fig. 16 is taken as a dividing line (the dividing line is a virtual line for ease of understanding only and is not present in the actual structure), the structure above the dividing line may be taken as the high beam module 11 for forming the high beam shape, and the structure below the dividing line may be taken as the low beam module 12 for forming the low beam shape. Of course, in different embodiments, the low beam module 12 and the high beam module 11 may be separately disposed, or may be integrally disposed, for example, as shown in fig. 16, the optical lenses 100 in the low beam module 12 and the high beam module 11 are integrally disposed, the optical surfaces of the optical lenses 100 in the low beam module 12 and the high beam module 11 are symmetrically disposed, the first total reflection surface 120 of the low beam module 12 is connected with the first total reflection surface 120 of the high beam module 11, the light exit surface 130 of the low beam module 12 is connected with the light exit surface 130 of the high beam module 11, and of course, in one embodiment, the low beam module 12 and the high beam module 11 may share one light exit surface 130, thereby further improving the integration degree of the lighting device 10, simplifying the light distribution, and reducing the volume of the lighting device 10.

As shown in fig. 17, the lighting device 10 of the present utility model is a low beam light pattern formed on a light distribution screen when being used as the low beam module 12, and the cut-off line structure 140 makes the low beam light pattern have a cut-off line, so as to meet the low beam lighting requirement.

In another aspect of the present embodiment, a vehicle lamp is provided that includes the lighting device 10 of any one of the above. By improving the optical lens 100 in the lighting device 10 such that the optical lens 100 has the first total reflection surface 120, the position of the light incident surface 110 of the optical lens 100 can be changed by the first total reflection surface 120, and thus, the lighting device 10 can be prevented from being oversized in the front-rear direction, the oversized lamp in the front-rear direction can be effectively avoided, and the restriction imposed on the lamp when mounted on a vehicle can be reduced.

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

Claims (11)

1. The lighting device is characterized by comprising a light source and an optical lens arranged on the light emitting side of the light source, wherein the optical lens is provided with a light incident surface, a first total reflection surface and a light emitting surface, the light incident surface is sequentially arranged along a light path, the first total reflection surface can collimate light along a first direction, the light emitting surface can collimate light along a second direction, the first direction and the second direction are mutually perpendicular or approximately perpendicular, and light rays emitted by the light source and incident through the light incident surface are reflected to the light emitting surface through the first total reflection surface to be collimated and emitted.

2. The illumination device of claim 1, wherein a sectional line of the first total reflection surface in the first direction is a curved line, and a sectional line of the first total reflection surface in the second direction is a straight line or an approximately straight line.

3. The illumination device of claim 2, wherein the first total reflection surface has a cylindrical or cylinder-like surface.

4. The illumination device according to claim 1, wherein the optical lens further has a primary reflecting surface located between the light incident surface and the first total reflecting surface in a light path direction, and light from the light source incident through the light incident surface is reflected to the first total reflecting surface through the primary reflecting surface.

5. A lighting device as recited in claim 4, wherein said primary reflective surface is a fully reflective surface or a reflective mirror surface having a light reflecting layer.

6. The illumination device of claim 1, further comprising a primary mirror having a primary reflecting surface, the primary mirror being positioned between the light source and the optical lens, the primary mirror being configured to reflect light from the light source to the light entrance surface of the optical lens.

7. A lighting device as recited in any one of claims 1-6, further comprising a cut-off line structure on a light-exiting side of said light source, said cut-off line structure being located at or near a focal point of said optical lens, said cut-off line structure being for forming a light-exiting light shape having a cut-off line.

8. A lighting device as recited in claim 7, wherein when said lighting device further comprises a primary reflecting surface, said cutoff line structure is disposed at or near a boundary of said primary reflecting surface on a side closer to said light source.

9. The illumination device of any one of claims 1 to 6, wherein the optical lens further has at least one second total reflection surface on the optical path for adjusting the optical path of light emitted by the light source within the optical lens.

10. A lighting device as recited in any one of claims 4-6, wherein a surface shape of said primary reflecting surface is a paraboloid, a paraboloid-like, an ellipsoid or an ellipsoid-like.

11. A vehicle lamp comprising a lighting device as claimed in any one of claims 1 to 10.