CN216307682U

CN216307682U - Optical structure for automobile headlamp

Info

Publication number: CN216307682U
Application number: CN202123372374.0U
Authority: CN
Inventors: 严帅; 王建明; 徐攀
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-04-15
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses an optical structure for an automobile headlamp, which comprises a light source plate, a lens assembly, a lens hood and a lens bracket, wherein the lens assembly is arranged on the light source plate; the lens assembly comprises three or more lenses which are sequentially arranged in sequence; the lens holder is adapted to hold a lens assembly; the light shield is suitable for shielding the side light-emitting of the lens closest to the light source plate in the lens component. The utility model creatively adopts the design of three or more lenses, can adjust light beams in the lens component for many times, and simultaneously shields the light beams emitted from the lens component through the lens hood, thereby avoiding the generation of redundant light and greatly improving the imaging quality of the optical structure.

Description

Optical structure for automobile headlamp

Technical Field

The utility model relates to the technical field of automobile illumination, in particular to an optical structure for an automobile headlamp.

Background

With the rapid development of the front lamp technology of the automobile, the optical module capable of projecting the multi-zone illumination area is increasingly becoming a popular technology for the research of various large lamp factories. However, in the existing multi-lens optical structure, because the light ray of the light emitting surface of the first lens is relatively divergent, part of the light beam is not transmitted to the next lens but is divergent towards the periphery of the lens, so that the final light emitting effect generates halo, the light emitting effect is poor, and the pixels are relatively low.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems that in a multi-lens optical structure in the prior art, because light rays on the light emitting surface of a first lens are relatively divergent, and partial light beams are not transmitted to a next lens but are divergent towards the periphery of the lens, the final light emitting effect is halo, the light emitting effect is poor, and pixels are relatively low, the utility model provides an optical structure for an automobile headlamp, which is used for solving the problems.

The technical scheme adopted by the utility model for solving the technical problems is as follows: an optical structure for automobile headlamps comprises a light source plate, a lens assembly, a lens hood and a lens bracket; the lens assembly comprises three or more lenses which are sequentially arranged in sequence; the lens holder is adapted to hold a lens assembly; the light shield is suitable for shielding the side light-emitting of the lens closest to the light source plate in the lens component.

Furthermore, a lens closest to the light source plate in the lens assembly is a first lens, and the light shield is fixed on the periphery of the light emitting surface of the first lens.

Furthermore, the lens component comprises a first lens, a second lens and a third lens which are sequentially arranged from the side of the light source to the outer side, and light rays provided by the light source plate enter the second lens for shaping after being collimated by the first lens and are finally emitted after being diffused by the third lens.

Furthermore, the first lens is a plano-convex lens, the light incident surface of the first lens is a plane, and the light emergent surface of the first lens is a curved surface.

Further, the second lens is a hyperboloid lens, and the light incident surface and the light emergent surface of the second lens are convex surfaces.

Furthermore, the light incident surface of the third lens is a concave surface, and the light emergent surface of the third lens is a convex surface.

Further, the first lens and the second lens are made of optical glass, and the third lens is made of optical glass or high-temperature plastic.

Further, a gap is formed between two adjacent lenses in the lens assembly.

Further, the lens support is including being suitable for the outer frame of parcel lens subassembly and lens hood, the lower part of outer frame has inside bellied fagging, first lens install in on the fagging, the periphery of third lens has outside bellied boss, the boss is placed in the top of outer frame, the second lens is connected with the middle part of outer frame.

The utility model has the beneficial effects that:

(1) the optical structure for the automobile headlamp creatively adopts the design of three or more lenses, can adjust light beams in the lens component for many times, and simultaneously shields the light beams emitted outside through the lens hood, thereby avoiding the generation of redundant light and greatly improving the imaging quality of the optical structure.

(2) The utility model adopts the combination of three lenses, the light collimation is finished through the first lens, the shaping is carried out through the second lens, the light divergence is realized through the third lens, and the better imaging quality is realized through the shortest axial distance of the lens component.

(3) The utility model fixes the lens component through the unique design of the lens bracket and keeps a reasonable distance between the first lens and the light source plate and between the adjacent lenses.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a block diagram of an embodiment of an optical structure for an automotive headlamp according to the present invention;

fig. 2 is a schematic diagram of the optical path of the present invention.

In the figure, 1, a light source plate, 2, a lens assembly, 201, a first lens, 202, a second lens, 203, a third lens, 2031, a boss, 3, a light shield, 4, a lens bracket, 401, an outer frame, 402 and a bracing plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, an optical structure for an automotive headlamp includes a light source board 1, a lens assembly 2, a light shield 3, and a lens holder 4; the lens component 2 comprises three or more lenses which are sequentially arranged in sequence; three steps of light collimation, light reshaping and light divergence can be completed in sequence through the matching of three or more lenses, the optimization of the imaging quality of an optical structure is realized, and the lens support 4 is suitable for fixing the lens component 2 and can play a role in positioning the light source plate 1; the lens hood 3 is suitable for shielding the lateral light emitting of the lens closest to the light source plate 1 in the lens assembly 2, the lateral light emitting of the lens refers to the light emitting along the direction with the larger deviation angle of the central axis of the lens, the light can not be transmitted to the next-stage lens generally, and after the lens is shielded, the generation of redundant light outside the light emitting area can be avoided, and the imaging quality is influenced.

The lens closest to the light source plate 1 in the lens assembly 2 is the first lens 201, and the light shield 3 is fixed on the periphery of the light exit surface of the first lens 201 and can shield the lateral light emitted from the light exit surface of the first lens 201.

Fig. 1 is a view showing an embodiment of an optical structure for an automotive headlamp according to the present invention, including a light source board 1, a lens assembly 2, a light shield 3, and a lens holder 4; the light source board is provided with a circuit board sub-assembly with a plurality of LED light sources, the lens assembly 2 comprises a first lens 201, a second lens 202 and a third lens 203 which are sequentially arranged from the light source side to the outer side, light rays provided by the light source board 1 enter the second lens 202 for shaping after being collimated by the first lens 201, and finally are emitted after being diffused by the third lens 203 (as shown in figure 2), and the light shield 3 is fixed on the periphery of the light-emitting surface of the first lens 201 and extends towards the second lens 202 from the first lens 201.

The specific design of the lens assembly 2 is:

the first lens 201 is a plano-convex lens, the light incident surface of the first lens 201 is a plane, and the light emergent surface of the first lens 201 is a curved surface. The incident light can be uniformly dispersed to the light emitting surface of the first lens 201 through the plane. The second lens 202 is a hyperboloid lens, the light incident surface and the light emitting surface of the second lens 202 are both convex surfaces, the angle of the light beam emitted from the first lens 201 is large, and the second lens 202 can adjust the angle of the light beam to shape the light beam. The third lens 203 is a concave-convex lens, the light incident surface of the third lens 203 is a concave surface, and the light emergent surface of the third lens 203 is a convex surface, so that the light beam can be emitted approximately horizontally.

In the present embodiment, the first lens 201 and the second lens 202 are made of optical glass material, and the third lens 203 is made of optical glass or high-temperature plastic.

Mounting of the lens assembly 2:

in this embodiment, a gap is formed between two adjacent lenses in the lens assembly 2, and the gap can make the light continue to extend after being emitted from the previous lens, and when the sizes of the openings between the lenses are different, the surface of the lens still has a larger light passing area.

The lens support 4 includes an outer frame 401 adapted to wrap the lens assembly 2 and the light shield 3, the bottom of the outer frame 401 is used for positioning the light source board 1, the lower portion of the outer frame 401 has an inwardly protruding supporting plate 402, the first lens 201 is mounted on the supporting plate 402, so that the first lens 201 and the light source board have a distance therebetween, the periphery of the third lens 203 has an outwardly protruding boss 2031, the boss 2031 is placed on the top of the outer frame 401, and similarly, the second lens 202 may also have a corresponding boss 2031 connected with the middle portion of the outer frame 401 (not illustrated in the drawings). The three lenses are connected to the upper, middle and lower three heights of the outer frame 401, respectively, so that the three lenses are sequentially arranged at intervals.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. An optical structure for an automotive headlamp, characterized in that: comprises a light source plate (1), a lens assembly (2), a light shield (3) and a lens bracket (4);

the lens component (2) comprises three or more lenses which are sequentially arranged in sequence; the lens holder (4) is adapted to hold a lens assembly (2);

the light shield (3) is suitable for shielding the side light-emitting of the lens closest to the light source plate (1) in the lens component (2).

2. The optical structure for an automotive headlamp according to claim 1, characterized in that: the lens closest to the light source plate (1) in the lens assembly (2) is made to be a first lens (201), and the light shield (3) is fixed to the periphery of the light-emitting surface of the first lens (201).

3. The optical structure for an automotive headlamp according to claim 1, characterized in that: the lens assembly (2) comprises a first lens (201), a second lens (202) and a third lens (203), wherein the first lens (201), the second lens (202) and the third lens (203) are sequentially arranged from the side of a light source to the outer side, light rays provided by the light source plate (1) enter the second lens (202) for shaping after being collimated by the first lens (201), and finally are emitted after being diffused by the third lens (203).

4. The optical structure for an automotive headlamp according to claim 3, characterized in that: the first lens (201) is a plano-convex lens, the light incident surface of the first lens (201) is a plane, and the light emergent surface of the first lens (201) is a curved surface.

5. The optical structure for an automotive headlamp according to claim 3, characterized in that: the second lens (202) is a hyperboloid lens, and the light incident surface and the light emergent surface of the second lens (202) are convex surfaces.

6. The optical structure for an automotive headlamp according to claim 3, characterized in that: the light incident surface of the third lens (203) is a concave surface, and the light emergent surface of the third lens (203) is a convex surface.

7. The optical structure for an automotive headlamp according to claim 3, characterized in that: the first lens (201) and the second lens (202) are made of optical glass, and the third lens (203) is made of optical glass or high-temperature plastic.

8. The optical structure for an automotive headlamp according to claim 3, characterized in that: a gap is arranged between two adjacent lenses in the lens component (2).

9. The optical structure for an automotive headlamp according to claim 8, characterized in that: lens support (4) are including outer frame (401) that is suitable for parcel lens subassembly (2) and lens hood (3), the lower part of outer frame (401) has inside bellied fagging (402), first lens (201) install in on fagging (402), the periphery of third lens (203) has outside bellied boss (2031), boss (2031) are placed in the top of outer frame (401), second lens (202) are connected with the middle part of outer frame (401).