TWM648138U - Vehicle headlight - Google Patents

Abstract

A general traffic lamp, which includes: at least one LED light source; a projection module installed in front of the LED light source; and an outer lens located in front of the projection module; wherein the projection module has at least one projector, and The projection module is made of silicone. This new type has the advantages of being easily reduced in size, having high weather resistance, simplifying the production process and reducing manufacturing costs.

Description

Traffic general lighting fixtures

This creation is about lighting technology, specifically a headlight for transportation.

The development of vehicle headlights has gone through the development process of incandescent lamps, halogen lamps, xenon headlights, LEDs and laser lamps. Among them, LED is currently the most commonly used light source for traffic lights. LED has appeared in recent years. Compared with incandescent lamps, halogen lamps and xenon headlights, LED lamps have the advantages of long illumination distance, low power consumption and high brightness. In order to make LED car lights suitable for the lighting needs of automobile lights, motorcycle lights, and electric car lights, and to comply with corresponding regulatory requirements, it is necessary to adapt the design of LED car lights for different types of vehicles.

The main purpose of this new model is to simplify the adaptive design of LED car lights so that they can meet the needs of various traffic lighting and make the car lights comply with corresponding regulatory requirements.

In order to achieve the above and other purposes, the present invention provides a general traffic lamp, which includes: an LED light source; a projection module installed in front of the LED light source; and an outer lens located in front of the projection module; wherein, the The projection module has at least one projector, and the projection module is made of silicone. The projector includes a light condensing part, a reflective curved surface and a light emitting surface. A light beam emitted by the LED light source is refracted and totally reflected by the projection module and then emitted parallel to the outer lens along an optical axis. Using the outer lens The curved surface design of the lens causes the light beam to form a predetermined light shape.

The new headlight structure is mainly composed of a projection module and an outer lens. The projection module emits all the light parallel to the distance along the optical axis, and uses the curved surface of the outer lens to design a light shape that meets the requirements of the regulations to meet the requirements of the corresponding regulations and achieve the effect of illuminating the road while preventing glare.

This new type of projection module is designed and optimized using free-form surfaces. The system is divided into two parts, one is the total reflection part and the other is the refraction part. This new type of general traffic lamp can control the distribution of light to adapt to the regulatory requirements of different vehicles. By controlling the light, the overall volume can be made smaller and the light concentration efficiency will be higher.

This new type of lens uses a free-form surface design to shape light. Compared with ordinary lenses, it reduces the number of lenses used and the thickness of the lenses while maintaining the same shaping effect. By using multiple LED diodes as light sources, the brightness of general traffic lamps is greatly increased. By replacing different LED particles and adjusting their power, different vehicle lighting needs can be met.

According to the new technical solution, the general traffic lamps can be made to have strong versatility and smaller size, realize the versatility problem of different vehicle lighting, and have the characteristics of long lighting distance, high lighting intensity and low energy consumption.

This new type of traffic general lamp can be installed with a baffle in front of the projection module. The baffle is not limited to a single baffle. A combination of baffles can be used to adapt to different traffic vehicles. For example, a baffle for a car may have a 45-degree angle or a 15-angle baffle. ; When used for motorcycles, it will be replaced by a flat baffle without angle; when used for electric vehicle lighting, flat baffles will also be used; when used for bicycle lighting, flat baffles can also be used. When the baffle is replaced, the power of the chip and the corresponding number of LED particles will be adjusted accordingly, but there is no need to redesign the projection module. By replacing the baffle and LED light source particles, different vehicle lighting needs can be met, such as the lighting needs of electric vehicles, motorcycles and automobiles. When designing the projection module, the lighting changes caused by the number and power of different LED light source particles have been taken into consideration. This change can be used to meet different vehicle lighting needs.

10:Outer lens

20: Shell

30:Baffle

31:Baffle carrier

40:Projection module

401: Projector

41: Concentration Department

42: Reflective surface

43:Light-emitting surface

50:Circuit board

60: Radiator

70:LED light source

Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention.

Figure 2 is an exploded view of Figure 1 of the present invention.

Figure 3 is an exploded view of Figure 2 of the present invention.

Figure 4 is a two-dimensional structural diagram of an implementation of the present invention.

Figure 5 is a schematic diagram of the optical path of the projector in Figure 4 of the present invention.

Figure 6 is a perspective view of a projection module according to an embodiment of the present invention.

Please refer to Figures 1 to 6. What is shown in the figure is an embodiment of a general traffic lamp provided by the present invention, including: a radiator 60, a plurality of LED light sources 70, a projection module 40, a baffle 30 and an outer surface. Lens 10. The LED light source 70 is installed on the circuit board 50 , the circuit board 50 is installed on the heat sink 60 , and the housing 20 is installed on the heat sink 60 . Among them, the outer lens 10 , the baffle 30 , and the projection module 40 are located in the housing 20 in order, so that the outer lens 10 is at the position furthest away from the LED light source 70 . In addition, the baffle 30 is installed on the baffle carrier 31 , and the baffle carrier 31 is installed on the radiator 60 .

The projection module 40 is made of silicone material and has a plurality of projectors 401 arranged side by side. Each projector 401 has a light condensing part 41 , a reflective curved surface 42 and a light emitting surface 43 . The LED light source 70 is aimed at the light condensing part 41. The LED light source 70 causes a light beam emitted to pass through the light condensing part 41 of the projection module 40 to be refracted or completely reflected by the reflective curved surface 42. The optical axis is parallel to the baffle 30 until the outer lens 10, and the curved surface design of the outer lens 10 is used to form a predetermined light shape of the light beam.

The light condensing part 41 is a circular concave part and faces the LED light source 70 as the light entrance end. The light condensing part 41 is divided into different areas in the circumferential direction and is individually designed to meet the needs of different traffic vehicles. lighting requirements, or can also meet the needs of special vehicles for special lighting effects at different circumferential positions of the projection module 40 .

The projector 401 of the projection module 40 is a collimator, so that the LED light source 70 can condense the light through the collimator and then emit it in parallel.

The projection module 40 is made of silicone material and is integrally formed. Compared with projection modules made of glass or PC (polycarbonate plastic), it will not yellow or deteriorate during use, and silicone has high weather resistance and can withstand high or low temperatures. High, not easily affected by the environment and cracked. Compared with the projection module 40 made of glass, its structural features need to be ground with machines, the production cost is higher, and the volume is not easy to reduce, resulting in an increase in the volume of the entire vehicle light. Therefore, the new projection module 40 is integrally formed with silicone, which is not only easy to reduce the overall volume, but also has high weather resistance, and is more conducive to simplifying the production process and reducing manufacturing costs.

In this embodiment, the outer surface of the outer lens 10 is an aspheric surface, and its surface shape equation is:

Where c is the curvature, k is the cone coefficient, C1, C2, C3...C20 are the aspheric coefficients, x is the rotational symmetry axis of the aspheric surface, and z represents the incident height of the incident light on the aspheric surface.

The outer lens 10 is also made of silicone material and is a lens with multiple focal points. The silicone material has high weather resistance and high tolerance to high or low temperatures. It is not easily affected by the environment and is not prone to cracking or yellowing or deterioration.

As shown in FIGS. 4 and 5 , the light-concentrating part 41 of the projector 401 of the projection module 40 is divided into a plurality of refraction blocks facing the receiving surface of the small-angle incident light, so that these refraction blocks have at least two focal length specifications. The orthographic projection of the block along the optical axis direction is a plurality of concentric sectors, and the sum of the central angles of all sectors is 360 degrees. Two adjacent refractive blocks form a step structure at the intersection. The design of the aforementioned sector-shaped partitions can enable different areas in the 40-circumferential direction of the projection module to have different light collection efficiency, light utilization rate and lighting effect. At the same time, it is relatively simple in structure and can quickly control the light distribution to meet the lighting needs of different vehicles.

The reflective curved surface 42 of the projector 401 is divided into a plurality of total reflection blocks. These total reflection blocks are all rotating curved surface segments centered on the optical axis, but these total reflection blocks have at least two different curved surface designs. The orthographic projection of all total reflection blocks along the optical axis direction is a plurality of concentric sectors, and the sum of the central angles corresponding to all sectors is 360 degrees. Two adjacent total reflection blocks form a step structure at the intersection. .

In this embodiment, the total reflection blocks and the refraction blocks correspond one by one in the radial direction, and the corresponding central angles of the corresponding total reflection blocks and the refraction blocks coincide with each other.

After the light distribution is controlled through the design of the projection module 40 , the light distribution is projected through the outer lens 10 . After corresponding calculations, different regulatory requirements and illumination requirements can be met.

Different vehicles have different traffic lighting requirements and regulations for general traffic lamps. To realize a universal traffic light fixture design, it is mainly achieved by controlling the projection module 40 and controlling the change of the baffle 30 and the number of particles of the LED light source 70 .

In order to overcome the shortcomings of traditional traffic general-purpose lamps that are difficult to achieve high efficiency, embodiments of the present invention disperse the surface light source into several LED point light sources and correspond to different projectors 401. The light condensing part 41 of each projector 401 can have different The contours of the light condensing part 41 are multiplied by weight coefficients respectively, these weighted contours are superimposed, and then the superimposed contours are optimized. The optimized variables are these weight coefficients, and the particle swarm optimization algorithm is used to find The optimal weight ratio can improve the efficiency of the system. Simulation verification shows that the efficiency can be increased by 20% to 30%. The working principle of the optimized light condensing part 41 is total reflection. In the process of transmitted light, part of the light is transmitted by light using the principle of total reflection.

The light-emitting surface of the projector 401 is a free-form surface, which is used to distribute light shapes. The data of the free-form surface is designed based on the road illumination required by large passenger transport and the intensity value of the 25m test point. The light-emitting surface is based on the intensity required by the test point, and then the surface shape of the free-form surface is designed to control A change in surface shape to achieve strength values that meet different demand points. According to the arbitrary changes of the free-form surface, to meet different intensity requirements, the intensity value can be increased, decreased, and the width requirement design can be realized, so as to achieve miniaturization and efficiency in the actual lighting process, and at the same time meet the verification of regulations.

When designing, it is necessary to take into account the common points and similarities between different regulations, and then adjust the light distribution to meet different needs. For example, when meeting the needs of automobile road lighting, the intensity value of each regulatory point must be taken into consideration. If you want to meet the lighting needs of motorcycles, you need to change the corresponding baffle 30 and the number of particles of the LED light source to meet the lighting needs of motorcycles. When designing the projection module 40, the lighting changes caused by the particle number and power of different LED light sources have been taken into consideration, and this change can be used to meet different lighting needs.

The above content is only the preferred implementation mode of the present invention. For those of ordinary skill in the art, there will be changes in the specific implementation mode and application scope according to the ideas of the present invention. The content of this description should not be understood as a limitation of the present invention. limits.

10:Outer lens

20: Shell

30:Baffle

31:Baffle carrier

40:Projection module

50:Circuit board

60: Radiator

Claims (14)

A general traffic lamp, which includes: at least one LED light source; a projection module installed in front of the LED light source; and an outer lens located in front of the projection module; characterized in that: the projection module has at least one projection device, and the projection module is made of silicone. The general traffic lamp as claimed in claim 1, wherein each projector has a light condensing part, a reflective curved surface and a light emitting surface, and the LED light source is aimed at the light condensing part. The general traffic lamp as claimed in claim 2, wherein the light condensing part is a circular concave part, and the light condensing part is circumferentially divided into a plurality of refraction blocks, and two adjacent refraction blocks form steps at the intersection. structure. The general traffic lamp as described in claim 3, wherein the refractive blocks have at least two focal length specifications. The general traffic lamp as described in claim 2 or 3, wherein the reflective curved surface is divided into a plurality of total reflection blocks, and two adjacent total reflection blocks form a step structure at the intersection. The general traffic light fixture as described in claim 5, wherein the total reflection blocks have at least two different curved surface designs. The general traffic lamp according to claim 2, wherein the light condensing part is a circular concave part, the light condensing part is divided into a plurality of refraction blocks in the circumferential direction, and the reflective curved surface is divided into a plurality of total reflection blocks, the The equal total reflection blocks correspond to the refractive surface refraction blocks one by one in the radial direction centered on an optical axis. The general traffic light fixture as described in claim 1, wherein the number of projectors is plural, and the projectors are arranged side by side. The general traffic light fixture as claimed in claim 1 or 8, wherein the at least one LED light source is mounted on a circuit board, the circuit board is mounted on a radiator, the radiator is mounted with a housing, the outer lens and the The projection module is located inside the housing. As claimed in claim 9, the general traffic lamp has a baffle installed in front of the projection module, the baffle is installed on a baffle carrier, and the baffle carrier is installed on the radiator. The general traffic lamp as described in claim 1 or 8, wherein the material of the outer lens is made of silicone integrally formed. The general traffic lamp as described in claim 11, wherein an outer surface of the outer lens is an aspherical surface, and its surface equation is:

Where c is the curvature, k is the cone coefficient, C1, C2, C3...C20 are the aspheric coefficients, x is the rotational symmetry axis of the aspheric surface, and z represents the incident height of the incident light on the aspheric surface. The general traffic lamp as claimed in claim 1, wherein the at least one projector is a collimator. The general traffic lamp as claimed in claim 11, wherein the outer lens is a multifocal lens with multiple focal points.

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