WO2020010932A1 - 一种车灯动态照明控制方法及其***和车灯 - Google Patents

一种车灯动态照明控制方法及其***和车灯 Download PDF

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WO2020010932A1
WO2020010932A1 PCT/CN2019/088522 CN2019088522W WO2020010932A1 WO 2020010932 A1 WO2020010932 A1 WO 2020010932A1 CN 2019088522 W CN2019088522 W CN 2019088522W WO 2020010932 A1 WO2020010932 A1 WO 2020010932A1
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light
lens
light source
different
dynamic lighting
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PCT/CN2019/088522
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English (en)
French (fr)
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张洁
董世琨
张园
周浩
孟凡
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华域视觉科技(上海)有限公司
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Priority claimed from CN201810775459.7A external-priority patent/CN109827138B/zh
Priority claimed from CN201821112400.1U external-priority patent/CN209295011U/zh
Application filed by 华域视觉科技(上海)有限公司 filed Critical 华域视觉科技(上海)有限公司
Publication of WO2020010932A1 publication Critical patent/WO2020010932A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters

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  • the present invention relates to vehicle lights, and in particular, the present invention relates to a dynamic lighting control method and device and vehicle light thereof.
  • the dynamic lighting control method and device and vehicle light thereof simultaneously have a high-light illumination light shape adjustment function and a low-light illumination light shape.
  • the adjustment function more specifically, the dynamic lighting adjustment according to the present invention can switch the light shape between different positions corresponding to the defocus amount of different lenses, and can also continuously change the light shape to achieve different speeds and different speeds. Road conditions, forming different light shapes to improve the lighting effect, ensure driving safety and reduce costs.
  • laser light sources are widely used in vehicle lights.
  • the publication number CN107314324A discloses a high-beam lamp.
  • the patent utilizes the characteristics of a small light source of the laser light source and the concentrated light emitted.
  • the yellow fluorescent plate is excited by a blue laser as a light source, and then the laser reflector and the optical The lens projects light onto the road to achieve the purpose of long distance exposure.
  • the implementation and principle of the above-mentioned high-beam lamp is no different from the traditional projection lighting system, that is, by setting an ellipsoid-like mirror with two focal points, the light source is set at a near focus, and the approximate Lambertian divergence emitted by the light source The light rays are converged to a far focal point through a reflector, the far focal point is set near the focal point of the lens, and the divergent light rays are collimated by the lens and emitted in parallel in a horizontal direction.
  • the inherent defect of the traditional projection lighting system is that the reflectivity of the ellipsoidal mirror generally does not exceed 85%, which results in a decrease in the overall light efficiency of the implementation of the high beam lamp.
  • the existing AFS function only changes the low beam light shape to meet different lighting requirements in different environments and road conditions, and improve driving safety. High beam lighting cannot be changed.
  • the present invention provides a dynamic lighting control method, device and vehicle light thereof.
  • the dynamic lighting control method, device and vehicle light thereof simultaneously have a high-light illumination light shape adjustment function and a low-light illumination light shape adjustment function.
  • the dynamic illumination adjustment according to the present invention can perform jump-type light shape switching between different light shape positions corresponding to different defocus amounts of different lenses, and can also perform continuous conversion of light shape to achieve different speeds and speeds.
  • Different road conditions form different lighting shapes.
  • low-speed driving is suitable for light shapes with a large amount of defocus, as shown in Figure 16, the illumination range is large, but the distance is short.
  • High-speed driving is suitable for the light shape shown in Figure 11 and the lighting distance is long, but the lighting range is small to ensure the purpose of improving light efficiency, driving safety and reducing costs.
  • a dynamic lighting control method for vehicle lights which uses a vehicle light dynamic lighting control system including a light source and a lens, is characterized in that:
  • the light source is an LED light emitting chip surface light source
  • the optical axis of the area light source is aligned with the incident surface of the lens
  • the light passing through the lens is propagated in parallel, forming a light beam shape on the front screen.
  • the surface light source is set in front of or behind the focal point of the lens to form a lens defocus, and the relative position of the surface light source with respect to the lens focal point, that is, the lens defocus amount, is used to realize the change of the front screen light shape, that is, dynamic lighting.
  • the illumination can be changed by adjusting the relative position of the light source relative to the lens focus, that is, the lens defocus amount.
  • Light shape the larger the lens defocus amount, the larger the light spot, and the smaller the Emax value. Therefore, dynamic illumination can be achieved by adjusting the defocus amount of the lens, and at the same time, it can be used to achieve the maximum beam high value (Emax value).
  • the dynamic lighting control method for vehicle lights characterized in that the light source is a rectangular or square LED light emitting chip surface light source, and the lens defocus amount is 0-5mm before or behind the lens focal point,
  • the luminous characteristics of the surface light source are similar to a Lambertian divergence, and the luminous angle ranges from 0 to 90 degrees.
  • the light emission characteristics are shown in FIG. 2.
  • the dynamic illumination light shape can be switched between several different positions corresponding to different lens defocus amounts, and the corresponding dynamic illumination light shapes are jump-type Change to set different light shapes according to different vehicle speeds and road conditions.
  • jump-type switching in different lighting modes such as switching between urban road mode and highway mode.
  • a plurality of lens defocus amounts can be preset, and jump position switching is performed between different lens defocus amounts, and the corresponding light shapes are also jump transitions (as shown in Figures 11 to 16, in Switch between 6 light shapes).
  • the dynamic illumination light shape can be continuously transformed between different positions corresponding to different lens defocus amount presets, and the corresponding dynamic illumination light shapes are also continuous The transformation, that is, the defocus amount is continuously transformed, and the light shape is continuously transformed accordingly.
  • the lens defocus amount is dynamically and continuously transformed, and its corresponding light shape is also continuously changed to avoid human eye discomfort caused by the sudden change of the illumination light shape.
  • Figure 11 shows the light shape of a 1mm * 5mm rectangular light-emitting chip set at the focal point of the lens, which is suitable for high-speed driving. It is characterized by a large Emax value and a long lighting distance, but a small lighting range.
  • Figure 17 shows the light shape of a 1mm * 5mm rectangular light-emitting chip set at a distance of 5mm from the focal point of the lens, which is suitable for urban road conditions. It is characterized by a large illumination range, but the Emax is not high, that is, the irradiation distance is not far.
  • a light emitting chip is provided at a focal point of a lens, and a light shape at the focal point of the lens is suitable for high-speed driving.
  • the technical solution is characterized by a large Emax value and a long lighting distance, but a small lighting range.
  • the dynamic lighting control method for vehicle lights according to the present invention is characterized in that a light emitting chip is provided at a distance of 5 mm from the focal point of the lens, so as to be suitable for urban road lighting.
  • the rectangular light-emitting chip is selected from a rectangular light-emitting chip of 1mm * 1-5mm, and the square light-emitting chip is selected from 1-5mm * 1-5mm.
  • Square light emitting chip is selected from 1mm * 1-5mm.
  • the method for controlling dynamic lighting of a vehicle lamp according to the present invention wherein the rectangular light emitting chip is selected from a rectangular light emitting chip of 1 mm * 5 mm.
  • the dynamic lighting control method for a vehicle lamp according to the present invention is characterized in that a light shielding plate is provided near the surface light source, the light shielding plate is disposed at the focal point of the lens, and the surface light source is disposed behind the light shielding plate, so as to form a light and dark cutoff.
  • Low-beam illumination of a line or part of said low-beam illumination is characterized in that a light shielding plate is provided near the surface light source, the light shielding plate is disposed at the focal point of the lens, and the surface light source is disposed behind the light shielding plate, so as to form a light and dark cutoff.
  • the lens is a convex lens
  • the convex lens is selected from a plano-convex lens, a hyperboloid lens, a Fresnel lens, and a lens group.
  • a dynamic lighting control system includes a light source and a lens, wherein the light source is an LED light emitting chip surface light source,
  • the optical axis of the surface light source is aligned with the incident surface of the lens, and the light emission angle is a hemispherical range of 0 to 90 degrees.
  • the light passing through the lens is propagated in parallel, forming a light beam shape on the front screen.
  • the surface light source is set in front of or behind the focal point of the lens to form a lens defocus, and the relative position of the surface light source with respect to the lens focal point, that is, the lens defocus amount, is used to realize the change of the front screen light shape, that is, dynamic lighting.
  • the lens defocus causes the illumination light shape to diffuse, and the Emax value will decrease, but the illumination range will also increase. Therefore, you can change the illumination light by adjusting the relative position of the light source relative to the lens focus, that is, the lens defocus amount. Shape, the greater the defocus amount of the lens, the larger the light spot, and the smaller the Emax value, the different the defocus amount, the corresponding Emax of the light shape is also different. Therefore, dynamic illumination can be achieved according to the amount of defocus of the lens.
  • the surface light source is set at 0-5 mm in front of or behind the focal point of the lens.
  • the dynamic illumination light shape can be switched between several different positions corresponding to different lens defocus amounts.
  • the corresponding dynamic illumination light shapes are Jumping change to set different light shapes according to different speeds and road conditions.
  • the maximum value of the high beam is lower, but the illumination range is larger.
  • a smaller lens defocus amount or no lens defocus amount is used to achieve a higher maximum value of high beam, so as to achieve the purpose of farther illumination.
  • the dynamic lighting control system for vehicle lights is characterized in that the surface light source is set at 0-5mm in front of or behind the focal point of the lens, corresponding to different positions of the light shape preset for different lens defocus amounts.
  • the illumination light shape can be switched between several different positions corresponding to different lens defocus amounts.
  • the corresponding dynamic illumination light shape is continuously changed to set different illumination light shapes according to different vehicle speeds and road conditions.
  • the maximum value of the high beam is lower, but the illumination range is larger.
  • a smaller lens defocus amount or no lens defocus amount is used to achieve a higher maximum value of high beam, so as to achieve the purpose of farther illumination.
  • a light shielding plate is disposed near the surface light source, the light shielding plate is disposed at the focal point of the lens, and the surface light source is disposed behind the light shielding plate, so as to form a low-light illumination with a cut-off line of light and dark, or a part of the low-light illumination.
  • a vehicle light dynamic lighting control system is provided.
  • the lens is a convex lens, and the convex lens is selected from a plano-convex lens, a hyperboloid lens, a Fresnel lens, and a lens group thereof.
  • a dynamic lighting control system for vehicle lights is used for a headlight headlight.
  • the vehicle light dynamic lighting control system is characterized in that the dynamic lighting system is used for the functions of daytime running lights, position lights, brake lights, turn lights and fog lights.
  • the invention has the following advantages and prominent effects: simple structure, high Eman value can be achieved only by using a full light source in combination with a lens, and a low-light beam is added on the basis of this.
  • the technology of the invention is mature, and the existing LED light sources and lenses can meet the output requirements. High light efficiency, smaller output luminous flux can achieve higher test point test value.
  • FIG. 1 is a schematic diagram of dynamic lighting of a vehicle lamp according to the present invention.
  • Fig. 2 is a schematic diagram showing the relationship between the light intensity and the angle of an LED light emitting chip. The figure illustrates that the light emitting characteristics of a surface light source, such as an LED light emitting chip, are similar to Lambertian divergence.
  • FIG. 3 is a schematic diagram of the simulated light shape of a light source input at 180 lumens.
  • FIG. 4 is a schematic diagram of a measured light shape of a product under a light source input of 180 lumens.
  • FIG. 5 is a schematic diagram of the overall screen illumination of the low beam.
  • FIG. 6 is a partial schematic diagram of the overall screen illumination of the low beam.
  • the H of the 75R test point is 1.15 degrees
  • the V is 0.57 degrees.
  • FIG. 7 is a schematic structural diagram of a low beam module with a light shielding plate.
  • FIG. 8 is a schematic structural diagram of a low beam module with a light shielding plate.
  • FIG. 9 is a schematic diagram of an optical path of a low beam module with a light shielding plate.
  • FIG. 10 is a schematic diagram of a screen illuminance simulation of a low beam module with a light shielding plate according to the present invention.
  • FIG. 11 is a schematic diagram of a light shape at a focal point of a rectangular LED light emitting chip (1mm * 5mm).
  • FIG. 12 is a schematic diagram of the light shape of a rectangular LED light emitting chip (1mm * 5mm) at a distance of 1mm from the focus.
  • FIG. 13 is a schematic diagram of the light shape of a rectangular LED light emitting chip (1mm * 5mm) at a distance of 2mm from the focus.
  • FIG. 14 is a schematic diagram of the light shape of a rectangular LED light emitting chip (1mm * 5mm) at a distance of 3mm from the focus.
  • FIG. 15 is a schematic diagram of the light shape of a rectangular LED light emitting chip (1mm * 5mm) at a distance of 4mm from the focus.
  • Figure 16 is a schematic diagram of the light shape of a rectangular LED light emitting chip (1mm * 5mm) at a distance of 5mm from the focus.
  • 1 is an LED light source
  • 2 is a lens
  • 3 is an LED circuit board
  • 4 is a light shielding plate
  • 5 is a cut-off line of the light shielding plate
  • 6 is a 75R test point.
  • a rectangular LED light emitting chip (1mm * 5mm) is set near the focal point on the inside of the convex lens.
  • the light emitted by the LED light source close to the Lambertian divergence is converged into nearly parallel light after the convex lens.
  • Emax the Emax value can exceed 240 lx, that is, the upper limit of the Emax value specified by regulations.
  • Figure 4 shows the simulated screen illumination results
  • Figure 5 shows the actual measurement of the product.
  • the Emax value determines the distance of high beam exposure.
  • a light shielding plate is provided in the vicinity of the surface light source.
  • the light shielding plate is disposed at the focal point of the lens, and the surface light source is disposed behind the light shielding plate.
  • One part, that is, the local low-beam illumination light shape near the inflection point of the low-beam, is combined with the auxiliary low-beam unit to achieve a complete low-beam light shape, which can achieve a higher 75R test point illuminance value with a smaller light flux.
  • the rectangular LED light emitting chip (1mm * 5mm) is respectively set at a defocus of 1mm, 2mm, 3mm, 4mm and 5mm inside the convex lens to obtain different light shapes for high beam lighting.
  • the defocus amount increases, the maximum value of the high beam gradually decreases, but the illumination range gradually increases.
  • Different vehicle speeds can be adopted accordingly, such as using a smaller lens defocus amount or no lens defocus amount when driving at high speed to achieve a higher maximum high beam value to achieve the purpose of farther illumination.
  • the maximum high beam (ie, Emax) needs to be within a certain brightness range.
  • Emax the maximum high beam
  • automotive LED headlights GB25991 is a regulation on the lighting function of LED light sources. Headlights, including high-beam, low-beam, and other lighting functions of light distribution performance requirements.
  • the high beam maximum value (that is, the Emax value) is required to be between 48lx and 240lx, and the 75R test point of low beam is required to be not less than 12lx. For better lighting effects, the value is generally increased to more than 20lx in actual lamp design. .
  • the dynamic lighting control method, the device and the vehicle light thereof according to the present invention simultaneously have a high-light illumination light shape adjustment function and a low-light illumination light shape adjustment function. Especially, in the case of vehicles driving at night, in order to meet the different environments and road conditions, To improve driving safety, not only for low beam light shape but also for high beam lighting light shape.
  • the dynamic lighting adjustment according to the present invention can perform jump-type light shape switching between different light shape positions corresponding to different defocus amounts of different lenses, and can also continuously change the light shape to achieve the formation according to different vehicle speeds and different road conditions. Different lighting shapes.

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种车灯动态照明控制方法及其装置，采用包括光源、透镜的车灯动态照明控制***，光源为面光源，如LED发光芯片面光源，面光源的光轴对准透镜的入射面，通过透镜将面光源发出的近似朗伯发散的光线进行一次准直后，使通过透镜后的光线以接***行传播，在前方屏幕形成高亮光束的光形，将面光源设置在透镜的焦点前或后方，即形成透镜离焦，调节面光源的透镜离焦量来实现前方屏幕光形的变化，即动态照明，以根据不同车速、路况设置不同的照明光形。由此达到确保提高光效、行车安全及降低成本的目的。

Description

一种车灯动态照明控制方法及其***和车灯 技术领域
本发明涉及车灯，具体地，本发明涉及一种动态照明控制方法及其装置和车灯，所述动态照明控制方法及其装置和车灯同时具有远光照明光形调节功能及近光照明光形调节功能，更具体地，本发明所述动态照明调节可以在对应不同透镜离焦量预设的不同位置之间进行光形切换，也可以进行光形的连续变换，以达到根据不同车速及不同路况，形成不同的照明光形，以改善照明效果、确保行车安全及降低成本的目的。
背景技术
目前，激光光源广泛用于车灯。
例如，公开号CN107314324A专利公开了一种远光灯，该专利利用激光光源的发光点小、投射出去的光线集中的特点，通过蓝色激光激发黄色荧光片作为光源，再通过激光反光杯及光学透镜将光线投射到路面，以达到照射距离远的目的。
然而，上述远光灯的实现方式及原理与传统的投射式照明***无异，即通过设置具有两个焦点的类椭球面反射镜，将光源设置在近焦点处，光源发出的近似朗伯发散的光线通过反射镜汇聚至远焦点处，所述远焦点设置在透镜的焦点附近，通过透镜将发散的光线准直后以水平方向接***行射出。而因传统的投射照明***的固有缺陷在于，所述椭球面反射镜的反射率一般不超过85％，由此导致该远光灯的实现方式整体光效降低。
另一方面，激光光源被用于车灯照明的一个重要问题是：其光能过于集中，往往需要通过类似荧光片进行散射后才能作为光源。此时，一旦激光意外照射到路面，如荧光粉层被击穿、激光意外照射到灯具内反射率较高的光滑表面；或车灯受到意外撞击，导致激光光源移位或倾斜等极端情况下，就会对路面造成不可想像的强光危害。由此需要一套严谨的安全防护***，以确保在极端情况下可以作出检测和判断，并及时关断激光电源，确保行人安全。然而，为此而设置的安全防护***的存在，导致技术难度大大增加，整体应用成本也会增加。
再有，随着车辆夜间行驶安全问题日益突出，而现有AFS功能仅针对近光光形进行变换，以满足不同环境及路况下的不同的照明需求，提高行车安全性。而远光照明则无法变换。
另外，目前的远光车灯***都是通过静态模式，难以根据不同车速，不同路况，设置不同的照明光形。
发明内容
为解决上述问题，本发明提供一种动态照明控制方法及其装置和车灯，所述动态照明控制方法及其装置和车灯同时具有远光照明光形调节功能及近光照明光形调节功能，特别是，在车辆夜间行驶情况下，为满足不同环境及路况下的不同的照明需求，提高行车安全性，不仅针对近光光形，也可对远光照明光形进行动态变换。
另外，目前的远光车灯***都是通过静态模式，难以根据不同车速，不同路况，设置不同的照明光形。
更具体地，本发明所述动态照明调节可以在对应不同透镜离焦量预设的不同光形位置之间进行跳跃式光形切换，也可以进行光形的连续变换，以达到根据不同车速及不同路况，形成不同的照明光形。例如，低速行驶适合离焦量大的光形，如图16，照明范围大，但距离近。高速行驶适用如图11所示光形，照明距离远，但照明范围小,以确保提高光效、行车安全及降低成本的目的。
本发明的动态照明控制***技术方案如下：
一种车灯动态照明控制方法，采用包括光源、透镜的车灯动态照明控制***，其特征在于，
所述光源为LED发光芯片面光源，
面光源的光轴对准透镜的入射面，
通过透镜将面光源发出的近似朗伯发散的光线进行一次准直后，使通过透镜后的光线以接***行传播，在前方屏幕形成高亮光束的光形，
将面光源设置在透镜的焦点前或后方，形成透镜离焦，调节面光源相对于透镜焦点的相对位置，即透镜离焦量，来实现前方屏幕光形的变化，即动态照明。
透镜离焦大导致照明光形扩散变大，所述Emax值会降低，但照明范围也会加大，因此，可以通过调节光源相对于透镜焦点的相对位置，即透镜离焦量，来改变照明光形，透镜离焦量越大，光斑越大，同时Emax值也越小。所以可以根据 调节透镜离焦量来实现动态照明，同时可用以实现远光最大值(Emax值)。
根据本发明所述一种车灯动态照明控制方法，其特征在于，所述光源为长方形或正方形的LED发光芯片面光源，所述透镜离焦量为透镜焦点前或后侧0-5mm，
所述面光源的发光特性为类似朗伯型发散，发光角度为0至90度的半球面范围。发光特性如图2所示。
根据本发明所述一种车灯动态照明控制方法，其特征在于，
对应不同透镜离焦量预设的不同位置，所述动态照明光形可在对应不同透镜离焦量预设的若干个不同位置之间进行切换，其对应的所述动态照明光形是跳跃式变换，以根据不同车速、路况设置不同的照明光形。
例如，在不同照明模式下进行跳跃式切换，如城市道路模式和高速公路模式之间的切换。在同一种照明模式下还可以根据车速进行连续变换的微调。
即，根据本发明，可以预设若干个透镜离焦量，在不同透镜离焦量之间进行跳跃式位置切换，其对应的光形也是跳跃式变换(如图11至图16所示，在6个光形之间切换)。
根据本发明所述一种车灯动态照明控制方法，其特征在于，
对应不同透镜离焦量预设光形的不同位置，所述动态照明光形可在对应不同透镜离焦量预设的不同位置之间进行连续变换，其对应的所述动态照明光形也是连续变换，即，离焦量连续变换，光形也相应地连续变换。
即，透镜离焦量动态连续变换，其对应的光形也是连续变换，以避免突然变化的照明光形导致的人眼不适。
如图11为1mm*5mm长方形发光芯片设置在透镜焦点处的光形，适用于高速行驶，特点是Emax值大，照明距离远，但照明范围较小。如图17为1mm*5mm长方形发光芯片设置在离透镜焦点5mm处的光形，适合城市道路路况，特点在于照明范围大，但Emax不高，即照射距离不远。
根据本发明所述一种车灯动态照明控制方法，其特征在于，在透镜焦点处设置发光芯片，该透镜焦点处的光形适用于高速行驶。
所述技术方案特点是Emax值大，照明距离远，但照明范围较小。
根据本发明所述一种车灯动态照明控制方法，其特征在于，在离透镜焦点5mm处设置发光芯片，以适合城市道路路况照明。
根据本发明所述一种车灯动态照明控制方法，其特征在于，所述长方形发光芯片选自1mm*1-5mm的长方形发光芯片，所述正方形发光芯片选自1-5mm*1-5mm 的正方形发光芯片。
根据本发明所述一种车灯动态照明控制方法，其特征在于，所述长方形发光芯片选自1mm*5mm的长方形发光芯片。
根据本发明所述一种车灯动态照明控制方法，其特征在于，在面光源附近设置遮光板，所述遮光板设置在透镜焦点处，面光源设置在遮光板后方，用以形成具有明暗截止线的近光照明或所述近光照明的一部分。
根据本发明所述一种设置车灯动态照明控制方法，所述透镜为凸透镜，所述凸透镜选自平凸透镜、双曲面透镜、菲涅尔透镜、透镜组。
根据本发明一种动态照明控制***，包括光源及透镜，其特征在于，所述光源为LED发光芯片面光源，
面光源的光轴对准透镜的入射面，发光角度为0至90度的半球面范围，
通过透镜将面光源发出的近似朗伯发散的光线进行一次准直后，使通过透镜后的光线以接***行传播，在前方屏幕形成高亮光束的光形，
将面光源设置在透镜的焦点前或后方，形成透镜离焦，调节面光源相对于透镜焦点的相对位置，即透镜离焦量，来实现前方屏幕光形的变化，即动态照明。
透镜离焦导致照明光形扩散变大，所述Emax值会降低，但照明范围也会加大，因此，可以通过调节光源相对于透镜焦点的相对位置，即透镜离焦量，来改变照明光形，透镜离焦量越大，光斑越大，同时Emax值也越小，不同离焦量对应光形的Emax也不同。所以可以根据调节透镜离焦量来实现动态照明。
根据本发明所述一种车灯动态照明控制***，其特征在于，将面光源设置在透镜的焦点前或后方0-5mm处，
对应不同透镜离焦量预设光形的不同位置，所述动态照明光形可在对应不同透镜离焦量预设的若干个不同位置之间进行切换，其对应的所述动态照明光形是跳跃式变换，以根据不同车速、路况设置不同的照明光形。
如低速行驶时采用较大的透镜离焦量，远光最大值较低，但照明范围较大。高速行驶时采用较小的透镜离焦量或无透镜离焦量，实现较高的远光最大值，以实现更远的照明的目的。
根据本发明所述一种车灯动态照明控制***，其特征在于，面光源设置在透镜的焦点前或后方0-5mm处，对应不同透镜离焦量预设光形的不同位置，所述动态照明光形可在对应不同透镜离焦量预设的若干个不同位置之间进行切换，其对应的所述动态照明光形是连续式变换，以根据不同车速、路况设置不同的照明光 形。
如低速行驶时采用较大的透镜离焦量，远光最大值较低，但照明范围较大。高速行驶时采用较小的透镜离焦量或无透镜离焦量，实现较高的远光最大值，以实现更远的照明的目的。
根据本发明所述一种车灯动态照明控制***，其特征在于，
在面光源附近设置遮光板，所述遮光板设置在透镜焦点处，面光源设置在遮光板后方，用以形成具有明暗截止线的近光照明，或近光照明的一部分。
由此，可以通过较小的光通量实现较高的75R测试点照度值。
根据本发明所述一种设置车灯动态照明控制***，透镜为凸透镜，所述凸透镜选自平凸透镜、双曲面透镜、菲涅尔透镜及其透镜组。
根据本发明所述一种车灯动态照明控制***，所述动态照明***用于前照灯大灯。
根据本发明所述一种车灯动态照明控制***，其特征在于，所述动态照明***用于日间行车灯、位置灯、制动灯、转向灯及雾灯功能。
本发明具有以下优点及突出性效果：结构简单，仅通过满光源结合透镜就能实现较高的Eman值，近光则在此基础上增设遮光板实现。本发明技术成熟，现有的LED光源及透镜就能满足输出要求。光效高，较小的输出光通量就能实现较高的测试点测试值。
附图说明
图1是本发明的车灯动态照明示意图。
图2是LED发光芯片光强与角度的关系示意图，该图说明面光源，如LED发光芯片的发光特性类似朗伯发散。
图3为光源输入在180流明条件下的模拟光形示意图。
图4为光源输入在180流明条件下的产品实测光形示意图。
图5为近光整体屏幕照度示意图。
图6为近光整体屏幕照度局部示意图。图中，75R测试点的H为1.15度，V为0.57度。
图7为带遮光板的近光模组结构示意图。
图8为带遮光板的近光模组结构示意图。
图9为带遮光板的近光模组光路示意图。
图10为本发明的带遮光板的近光模组屏幕照度模拟示意图。
图11长方形LED发光芯片(1mm*5mm)焦点处光形示意图。
图12长方形LED发光芯片(1mm*5mm)离焦1mm处光形示意图。
图13长方形LED发光芯片(1mm*5mm)离焦2mm处光形示意图。
图14长方形LED发光芯片(1mm*5mm)离焦3mm处光形示意图。
图15长方形LED发光芯片(1mm*5mm)离焦4mm处光形示意图。
图16长方形LED发光芯片(1mm*5mm)离焦5mm处光形示意图。
图中，1是LED光源，2为透镜，3为LED线路板，4为遮光板，5为遮光板截止线，6为75R测试点。
具体实施方式
实施例
将长方形LED发光芯片(1mm*5mm)设置在凸透镜内侧的焦点附近，LED光源发出的接近朗伯发散的光线经过凸透镜后被汇聚成接***行的光线，水平照射到路面，形成远光最大值(Emax)，通过这种方法，仅0.5平方毫米发光面积的LED光源，输出光通量不大于200lm的情况下，Emax值就能超过240lx，即超出法规规定的Emax值上限。图4为模拟的屏幕照度结果，图5为产品实测。而Emax值决定了远光照射的距离。
上述方法也可以用于近光中要求亮度较高的测试点，如75R值。在本发明基础上，结合在面光源附近设置遮光板，所述遮光板设置在透镜焦点处，面光源设置在遮光板后方，用以形成具有明暗截止线的近光照明，或近光照明的一部分，即靠近近光拐点附近的局部近光照明光形，在结合辅助近光单元实现完整的近光光形，这样可以通过较小的光通量实现较高的75R测试点照度值。
再将长方形LED发光芯片(1mm*5mm)分别设置在凸透镜内侧离焦1mm，2mm，3mm，4mm及5mm处，获得不同光形，用于远光照明。此时，随着离焦量增大，远光最大值渐低，但照明范围渐大。可相应采取不同车速，如高速行驶时采用较小的透镜离焦量或无透镜离焦量，实现较高的远光最大值，以实现更远的照明的目的。
根据车灯远光法规，远光最大值(即Emax)需要在一定的亮度范围内，如汽 车用LED前照灯GB25991是关于LED光源的车灯照明功能法规,确定了以LED作为光源的前照灯，包括远光、近光等照明功能的配光性能要求。其中远光最大值(即Emax值)要求在48lx至240lx之间，近光的75R测试点要求不低于12lx，为了较好的照明效果，实际灯具设计时一般都将该值提高到20lx以上。
根据本发明的动态照明控制方法及其装置和车灯，同时具有远光照明光形调节功能及近光照明光形调节功能，特别是，在车辆夜间行驶情况下，为满足不同环境及路况下的不同的照明需求，提高行车安全性，不仅针对近光光形，也可对远光照明光形进行动态变换。
本发明所述动态照明调节可以在对应不同透镜离焦量预设的不同光形位置之间进行跳跃式光形切换，也可以进行光形的连续变换，以达到根据不同车速及不同路况，形成不同的照明光形。

Claims (12)

  1. 一种车灯动态照明控制方法，采用包括光源、透镜的车灯动态照明控制***，其特征在于，
    所述光源为LED发光芯片面光源，
    面光源的光轴对准透镜的入射面，
    通过透镜将面光源发出的近似朗伯发散的光线进行一次准直后，使通过透镜后的光线以接***行传播，在前方屏幕形成高亮光束的光形，
    将面光源设置在透镜的焦点前或后方，形成透镜离焦，调节面光源相对于透镜焦点的相对位置，即透镜离焦量，来实现前方屏幕光形的变化，即动态照明。
  2. 如权利要求1所述一种车灯动态照明控制方法，其特征在于，所述光源为长方形或正方形的LED发光芯片面光源，所述透镜离焦量为透镜焦点前或后侧0-5mm，
    所述面光源的发光特性为类似朗伯型发散，发光角度为0至90度的半球面范围。
  3. 如权利要求1所述一种车灯动态照明控制方法，其特征在于，对应不同透镜离焦量预设的不同位置，所述动态照明光形可在对应不同透镜离焦量预设的若干个不同位置之间进行切换，其对应的所述动态照明光形是跳跃式变换，以根据不同车速、路况设置不同的照明光形。
  4. 如权利要求2所述一种车灯动态照明控制方法，其特征在于，在透镜焦点处设置发光芯片，该透镜焦点处的光形适用于高速行驶。
  5. 如权利要求2所述一种车灯动态照明控制方法，其特征在于，在离透镜焦点5mm处设置发光芯片，以适合城市道路路况照明。
  6. 如权利要求2-5任一项所述一种车灯动态照明控制方法，其特征在于，所述长方形发光芯片选自1mm*1-5mm的长方形发光芯片，所述正方形发光芯片选自1-5mm*1-5mm的正方形发光芯片。
  7. 如权利要求6所述一种车灯动态照明控制方法，其特征在于，所述长方形发光芯片选自1mm*5mm的长方形发光芯片。
  8. 如权利要求1所述一种车灯动态照明控制方法，其特征在于，在面光源附近设置遮光板，所述遮光板设置在透镜焦点处，面光源设置在遮光板后方，用以 形成具有明暗截止线的近光照明或所述近光照明的一部分。
  9. 一种动态照明控制***，包括光源及透镜，其特征在于，所述光源为LED发光芯片面光源，
    面光源的光轴对准透镜的入射面，发光角度为0至90度的半球面范围，
    通过透镜将面光源发出的近似朗伯发散的光线进行一次准直后，使通过透镜后的光线以接***行传播，在前方屏幕形成高亮光束的光形，
    将面光源设置在透镜的焦点前或后方，形成透镜离焦，调节面光源相对于透镜焦点的相对位置，即透镜离焦量，来实现前方屏幕光形的变化，即动态照明。
  10. 如权利要求9所述一种车灯动态照明控制***，其特征在于，将面光源设置在透镜的焦点前或后方0-5mm处，
    对应不同透镜离焦量预设光形的不同位置，所述动态照明光形可在对应不同透镜离焦量预设的若干个不同位置之间进行切换，其对应的所述动态照明光形是跳跃式变换，以根据不同车速、路况设置不同的照明光形。
  11. 如权利要求9所述一种车灯动态照明控制***，其特征在于，面光源设置在透镜的焦点前或后方0-5mm处，对应不同透镜离焦量预设光形的不同位置，所述动态照明光形可在对应不同透镜离焦量预设的若干个不同位置之间进行切换，其对应的所述动态照明光形是连续式变换，以根据不同车速、路况设置不同的照明光形。
  12. 如权利要求9所述一种车灯动态照明控制***，其特征在于，在面光源附近设置遮光板，所述遮光板设置在透镜焦点处，面光源设置在遮光板后方，用以形成具有明暗截止线的近光照明或近光照明的一部分。
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US20090141513A1 (en) * 2007-11-29 2009-06-04 Sl Seobong Adaptive front light system using led headlamp
CN105351839A (zh) * 2011-09-01 2016-02-24 株式会社小糸制作所 车辆用前照灯装置
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