CN220506543U

CN220506543U - General headlight of traffic

Info

Publication number: CN220506543U
Application number: CN202320175342.1U
Authority: CN
Inventors: 郑荣修; 黄大泽
Original assignee: Shanghai Jiuke General Accessories Co ltd
Current assignee: Shanghai Jiuke General Accessories Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2024-02-20
Anticipated expiration: 2033-02-10

Abstract

The utility model discloses a general traffic headlight, which comprises an LED, a free-form surface convergence system positioned in front of the LED, a baffle positioned in front of the free-form surface convergence system, and a free-form surface outer lens positioned in front of the baffle, wherein the free-form surface convergence system comprises a collimator and a free-form surface, the collimator is used for radiating light rays to a far place in parallel along an optical axis, and the free-form surface of a light outlet is used for designing a light shape meeting the requirements of regulations. The headlamp structure of the design mainly comprises a collimator, a free-form surface and a free-form surface outer lens. The collimator emits all light rays to a far place in parallel along the optical axis, and the free-form surface of the light outlet is used for designing the light shape meeting the regulation requirement. The light source is an LED. The light emitted by the LED forms parallel light through the collimator, and then the parallel light is scattered and deflected by the free-form surface outer lens to meet the requirements of corresponding regulations, so that the effect of illuminating the road surface and preventing glare is achieved.

Description

General headlight of traffic

Technical Field

The utility model relates to illumination technology, in particular to a head lamp for a vehicle.

Background

The development of the traffic headlamp is subjected to the development processes of an incandescent lamp, a halogen lamp, a xenon headlight, an LED and laser, wherein the LED is a light source of a traffic lamp which is most commonly used at present, and the LED is a novel lamp light source which appears in recent years. In order to make the LEDs suitable for the lighting requirements of automobile lamps, motorcycle lamps and electric lamps and make the automobile lamps, the motorcycle lamps and the electric lamps meet the corresponding legal requirements, the LED lamps of different wheels need to be adaptively designed.

Disclosure of Invention

The technical problems solved by the utility model are as follows: how to simplify the adaptive design of the LED car lamp, so that the LED car lamp can meet the requirements of various traffic lights, and the car lamp meets the corresponding legal requirements.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a general headlight of traffic, includes LED, is located the free-form surface gathering system in LED the place ahead, is located the baffle in free-form surface gathering system the place ahead to and be located the free-form surface outer lens in baffle the place ahead, free-form surface gathering system includes collimator and free-form surface, and the collimator is all to be directed to the distance along the optical axis parallel with light, utilizes the free-form surface design of light outlet to accord with the light shape of regulation requirement.

The headlamp structure of the design mainly comprises a collimator, a free-form surface and a free-form surface outer lens. The collimator emits all light rays to a far place in parallel along the optical axis, and the free-form surface of the light outlet is used for designing the light shape meeting the regulation requirement. The light source is an LED. The light emitted by the LED forms parallel light through the collimator, and then the parallel light is scattered and deflected by the free-form surface outer lens to meet the requirements of corresponding regulations, so that the effect of illuminating the road surface and preventing glare is achieved.

The free-form surface light focusing system is designed and optimized by adopting a free-form surface, and is divided into two parts, namely a total reflection part and a refraction part. The system can perform distribution regulation and control on light. By analyzing the legal requirements of different vehicles, the light can be regulated and controlled, the whole volume can be smaller, the free curved surface is adopted for design, the whole light condensing efficiency of the light condensing system is higher, the volume can be smaller, and the light condensing system is better than the conventional light condensing system. When the free-form surface condensing system is designed, the design of the free-form surface condensing system adopts a mode of combining direct calculation and an optimization algorithm, firstly, a light source is approximated to be a point light source, the surface of the condensing system is approximated to be a plane, and a grid mapping method and an iterative algorithm are utilized to solve refraction and total reflection surfaces, so that the initial surface shape of the condensing system is obtained. And then, an optical model is built according to the structure of the car lamp, a light source is set as a surface light source, and the refraction and total reflection surfaces of the light condensing system are optimized to obtain the final surface type of the light condensing system.

Compared with a common lens, the utility model adopts the free-form surface design to shape the light, and reduces the use quantity of the lenses and the thickness of the lenses on the premise of keeping the same shaping effect. By adopting a plurality of LED diodes as light sources, the brightness of the car lamp is greatly increased, and different particles are replaced and the power is adjusted, so that different vehicle lighting requirements are met.

According to the technical scheme of the utility model, the car lamp has the characteristics of strong universality, smaller volume, long illumination distance, high illumination intensity, low energy consumption and the like, and the problem of universality of different car illuminations is solved.

The material of the free-form surface outer lens is silica gel.

The free-form surface outer lens is of an aspheric structure, specifically a polynomial aspheric surface, and the surface equation is as follows:

where C is curvature, k is conic coefficient, C1, C2, C3 … C20 are aspheric coefficients, x is the rotational symmetry axis of the aspheric surface, and z represents the incidence height of the incident light on the aspheric surface.

The baffle of the design is not a single baffle and comprises a baffle combination of various traffic vehicles, for example, a baffle with an angle of 45 degrees or an angle of 15 degrees for an automobile; when the baffle is used for a motorcycle, the baffle is replaced by a plane baffle without an angle; a plane baffle is also used when the electric vehicle is illuminated; the bicycle can also use a plane baffle plate when being illuminated. The power of the chip and the corresponding particle count are adjusted accordingly when the baffle is replaced, but without the need for redesigning the inner lens. By changing the baffle and the particles, different lighting requirements of vehicles, such as electric vehicles, motorcycles and automobiles, can be met. When designing free-form surface convergence systems, the illumination variation caused by different particle numbers and powers is considered, and different vehicle illumination requirements can be met by utilizing the variation.

Drawings

The utility model is further described with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of a traffic general headlight with brand new light distribution, such as an LED automobile, a motorcycle and the like;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a two-dimensional structure diagram of a traffic general headlight with brand new light distribution, such as an LED automobile, a motorcycle and the like;

FIG. 5 is a schematic diagram of the free-form surface converging system of FIG. 4;

FIG. 6 is a schematic diagram of a free-form surface convergence system calculation process.

The symbols in the drawings illustrate:

10. a free-form surface outer lens;

20. a decorative frame;

30. a baffle; 31. a baffle plate bearing frame;

40. a free-form surface convergence system;

50. an LED particle board;

60. a heat sink.

Detailed Description

Referring to fig. 1 to 4, a general traffic headlight design for LED automobiles and motorcycles with a novel light distribution includes LEDs, a free-form surface converging system 40, different types of baffles 30, and a free-form surface outer lens 10. The LEDs are arranged on an LED particle board 50, the LED particle board is arranged on a radiator 60, a decorative frame 20 is arranged on the radiator, and the free-form surface outer lens 10, the baffle 30 and the free-form surface converging system 40 are positioned in the decorative frame 20. Wherein the baffle 30 is mounted on a baffle carrier 31 mounted on the heat sink 60.

The core of the free-form surface converging system 40 is to divide the light inlet end of the condenser into different areas in the circumferential direction, and to perform individual design in the areas so as to meet the lighting requirements of different traffic vehicles at the same time or meet the requirements of special vehicles on special lighting effects of different positions of the condenser in the circumferential direction.

As shown in fig. 5, the freeform surface converging system 40 divides the light receiving surface of the low-angle incident light into a plurality of refractive surfaces, so that the refractive surfaces have at least two focal length specifications, the orthographic projection of the refractive surfaces along the direction of the designed optical axis is a concentric sector, the sum of the central angles of all the sectors is 360 degrees, and the adjacent two refractive surfaces form a step structure at the junction, and a plane passing through the designed optical axis is used as an interface. The method is equivalent to carrying out circumferential sector partition on the small-angle incident light receiving surface of the light inlet end by taking the design optical axis as the center, so that different areas on the circumference of the condenser have different light collecting efficiency, light utilization rate and lighting effect, and meanwhile, the method is relatively simple in structure, and can be used for quickly regulating and controlling light distribution, thereby meeting the lighting requirements of different vehicles.

And then, dividing the total reflection surface of the light incident end into a plurality of total reflection blocks, wherein the total reflection blocks are rotation curved surface segments with rotation axes coincident with a design optical axis, but at least two plane curves forming the total reflection blocks are different, orthographic projections of all the total reflection blocks along the direction of the design optical axis are fan-shaped rings with the same circle center, the sum of central angles corresponding to all the fan-shaped rings is 360 degrees, the adjacent two total reflection blocks form a step structure at the junction, and the interface is a plane passing through the design optical axis.

Preferably, the total reflection blocks and the refraction surfaces are in one-to-one correspondence in the radial direction, and the corresponding central angles of the total reflection blocks and the refraction surfaces are coincident.

After the light distribution is controlled by the design of the free-form surface converging system 40, the light distribution is projected through the free-form surface outer lens 10. Different legal requirements and illumination requirements can be met through corresponding calculation.

Traffic lighting requirements and regulations for lamps of different vehicles are different. The primary use of controlling the freeform convergence system 40 and controlling the variation of the baffle 30 and the number of LED particles is to achieve a universal vehicle lamp design.

Structurally, the free-form surface convergence system 40 includes a collimator and a free-form surface.

In order to overcome the defect that the traditional car light LED collimator is difficult to realize high efficiency, a collimation optimization lens method is designed. An optical design of a car light LED collimator based on an extended LED light source. An LED collimator for a car lamp is designed based on an LED point light source to serve as an initial structure. The surface light source is scattered into a plurality of point light sources, each point light source is designed into a collimator contour for the LED of the car light, the collimator contours are multiplied by weight coefficients respectively, the weighted contours are overlapped, then the overlapped contours are optimized, the optimized variables are the weight coefficients, the optimal weight ratio is found by using a particle swarm optimization algorithm, the efficiency of the system is improved, simulation verification shows that the efficiency can be improved by 20 to 30 percent. The working principle of the optimized collimator is total reflection. During transmission of light, part of the light is transmitted by light using the principle of total reflection. Since the collimator is axisymmetric, only the upper half of the collimator is analyzed, as shown in fig. 5, and the parting line MN splits the light emitted at point O into two parts. When light is refracted to the inside through the ac part of the inner wall of the inner hole, the light reaching the outer contour curve ab of the collimator is totally reflected by the inner structure and is emitted in parallel; refraction from the center cd of the inner hole to the inside mainly uses the imaging principle of the design of an automobile headlamp optical system based on a double free-form surface lens of an aspheric lens to enable light rays to exit in parallel. Finally, the two parts of light rays are emitted in parallel at the light exit surface of the collimator and are both collimated light rays.

And (3) designing by using the collimator optimized in the last step. The collimator light outlet is a free-form surface. The free-form surface outside the collimator can be used for distribution of the light shape. And (3) carrying out data design of the free-form surface according to the road illuminance required by the bus and the intensity value of the test point of 25m, wherein the free-form surface designed by the collimator light outlet is according to the intensity required by the test point, then, designing the surface shape of the free-form surface, and controlling one change of the surface shape, so that the intensity values of different requirement points are met. The design of the rising and falling of the intensity values and the width requirement can be realized according to the random change of the free curved surface, so that the miniaturization, the high efficiency and the verification of the regulations in the actual lighting process are realized.

In design, the common point and the similar point between different regulations are considered, and then different requirements, such as automobile road lighting requirements, are met by regulating the light distribution, so that the intensity value of each regulation point is considered. For example 75r,50r, etc., if the module is to be used to meet the lighting requirements of a motorcycle, the corresponding number of baffles 30 and particles need to be replaced to meet the lighting requirements of the motorcycle. The varying illumination requirements can be met by the varying particle count and power that may be accounted for in the design of the freeform surface convergence system 40.

The foregoing is merely illustrative of the preferred embodiments of the present utility model, and modifications in detail will readily occur to those skilled in the art based on the teachings herein without departing from the spirit and scope of the utility model.

Claims

1. A general headlight of traffic, includes LED, free-form surface convergence system (40) in front of LED, baffle (30) in front of free-form surface convergence system, and free-form surface outer lens (10) in front of baffle, its characterized in that: the free-form surface converging system comprises a collimator and a free-form surface, wherein the collimator is used for radiating light rays to a far place in parallel along an optical axis, and the free-form surface of the light outlet is used for designing a light shape meeting the requirements of regulations.

2. A traffic light according to claim 1, wherein: the LED is arranged on an LED particle board (50), the LED particle board is arranged on a radiator (60), a decorative frame (20) is arranged on the radiator, and the free-form surface outer lens (10), the baffle (30) and the free-form surface converging system (40) are positioned in the decorative frame.

3. A traffic light according to claim 2, wherein: the baffle (30) is mounted on a baffle carrier (31) mounted on the radiator (60).

4. A traffic light according to claim 1, wherein: the material of the free-form surface outer lens (10) is silica gel.

5. A traffic light according to claim 1, wherein: the free-form surface outer lens (10) is of an aspheric structure, and the surface equation is as follows: