CN105258057B - 一种led车用大灯 - Google Patents

一种led车用大灯 Download PDF

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CN105258057B
CN105258057B CN201510738153.0A CN201510738153A CN105258057B CN 105258057 B CN105258057 B CN 105258057B CN 201510738153 A CN201510738153 A CN 201510738153A CN 105258057 B CN105258057 B CN 105258057B
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lamp housing
convex lens
led chip
red copper
copper block
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CN105258057A (zh
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焦栋青
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Xi'an Ruilaite Automotive Technology Co Ltd
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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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/192—Details of lamp holders, terminals or connectors
    • 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
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • F21S45/46—Forced cooling using liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/49—Attachment of the cooling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F21Y2105/12—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities

Abstract

本发明公开了一种LED车用大灯，包括灯壳体、第一凸透镜和第二凸透镜；灯壳体上设置有调焦环，调焦环上固定有第一凸透镜，第二凸透镜固定在支架上，支架通过支柱安装于灯壳体底部上，灯壳体底部上固定有电路板，电路板正面上焊接有遮光板和两组LED单元体，背面焊接有导热的紫铜块，紫铜块与灯壳体尾部间形成一个密封腔体，密封腔体上连接有散热装置，遮光板位于两组LED单元体之间。本发明通过第一凸透镜与第二凸透镜组成双透镜组合直射汇聚光束，配合一个水平安置的遮光板成像，不仅使光会聚良好，也得到了良好的光型折线，使得光效率进一步提高，同时还实现了远近光的组合。且由于设置紫铜块导热结构，因此降低了LED芯片的热阻，提高了光效率。

Description

一种LED车用大灯
技术领域
本发明涉及LED灯，具体涉及一种LED车用大灯。
背景技术
近些年来，LED照明作为一种新型绿色光源，正在迅猛发展中，其节能高光效和绿色环保等优点，将会逐步取代传统光源，目前已在家庭照明到公共道路照明中得到很好的验证。
汽车行业作为一个庞大的体系，其照明系统也会随科技进步而发展起来，目前国外汽车巨头们已经在投巨资来开发LED前大灯，并且已经在一些高端车型中小量投放市场了，但汽车用LED大灯却面临一些技术难题，单芯片功率难以做大，多芯片组合就面临光会聚的问题，车灯投射光型是汽车灯光最重要的参数，这直接影响到行车安全问题；在光型会聚方面，目前采用的是方法多是反射式和异型树脂透镜，这两种都在光会聚方面不理想，单透镜(氙气灯采用的会聚)对于LED多点光源更是不理想，还有一个棘手的问题就是LED的散热问题。
热阻就是阻碍LED芯片发出的热量能否迅速传到散热系统的热传导能力，当然越低越好，热阻也是影响LED光效率和功率的直接因素，良好的解决了芯片的热阻，才可能发挥LED高光效的优点，汽车由于其移动性和空间有限，不可能用很大的散热器，即使有条件散热，没有很低的热阻，也会致使LED芯片过热，寿命缩短甚至烧毁，因此要良好的解决LED的散热。
发明内容
本发明为了解决上述技术问题，提供了一种LED车用大灯，降低了LED芯片的热阻，提高了输出光强和光效率，既不影响对方车辆安全，又使得驾驶者自己有良好的照明，巧妙实现远近光切换。
本发明是通过以下技术方案来实现：
一种LED车用大灯，包括灯壳体、第一凸透镜和第二凸透镜；灯壳体上设置有调焦环，调焦环上固定有第一凸透镜，第二凸透镜固定在支架上，支架通过支柱安装于灯壳体底部上，灯壳体底部上固定有电路板，电路板正面上焊接有遮光板和两组LED单元体，背面焊接有导热的紫铜块，紫铜块与灯壳体尾部间形成一个密封腔体，密封腔体上连接有散热装置，遮光板位于两组LED单元体之间。
所述的电路板正面上焊接有近光LED芯片和远光LED芯片，近光LED芯片和远光LED芯片之间水平设置有遮光板，近光LED芯片位于遮光板上方，远光LED芯片位于遮光板下方。
所述的遮光板前缘设有弧线，近光LED芯片和远光LED芯片发出的光束经由遮光板前缘弧线成像。
所述的散热装置包括冷却液循环水管和循环水管，灯壳体上设置有与密封腔体相连通的冷却液循环水管和循环水管，冷却液循环水管和循环水管外部接水泵和散热水箱。
所述的LED单元体底部中间为LED单元体的发热体部分，发热体部分两边均设有电极，发热体部分通过焊接面直接焊接在紫铜块的凸台上，紫铜块凸台镶嵌在电路板上，电极则与电路板焊接，紫铜块背面与密封腔体中的循环冷却水接触。
与现有技术相比，本发明具有以下有益的技术效果：
本发明通过第一凸透镜与第二凸透镜组成双透镜组合直射汇聚光束，配合一个水平安置的遮光板成像，不仅使光会聚良好，也使得光效率进一步提高，同时还实现了双光(远近光)的组合。且由于双透镜组合直射光束会聚，因而减小了光损耗、提高了输出光强。同时，由于水平安置异型遮光板，因此得到了良好的光型折线，既不影响对方车辆安全，又使得驾驶者自己有良好的照明，巧妙的实现远近光切换，这对驾驶车辆和对面车辆会车尤为重要。此外，由于设置紫铜块导热结构，因此降低了LED芯片的热阻，提高了光效率。
附图说明
图1为本发明提供的LED车用大灯剖视结构示意图一；
图2为本发明提供的LED车用大灯剖视结构示意图二；
图3为本发明提供的LED车用大灯中的LED大灯局部放大图。
其中，1为灯壳体；2为第一凸透镜；3为第二凸透镜；4为支架；5为支柱；6为近光LED芯片；7为遮光板；8为远光LED芯片；9为电路板；10为冷却液循环水管；11为紫铜块；12为密封腔体；13为调焦环；14为循环水管；15为发热体部分；16为电极；17为焊接面。
具体实施方式
下面结合具体的实施例对本发明做进一步的详细说明，所述是对本发明的解释而不是限定。
参见图1至图3，一种LED车用大灯，包括灯壳体1、第一凸透镜2和第二凸透镜3；灯壳体1上设置有调焦环13，调焦环13上固定有第一凸透镜2，第二凸透镜3固定在支架4上，支架4通过支柱5安装于灯壳体1底部上，灯壳体1底部上固定有电路板9，所述的电路板9正面上焊接有近光LED芯片6和远光LED芯片8，近光LED芯片6和远光LED芯片8之间水平设置有遮光板7，近光LED芯片6位于遮光板7上方，远光LED芯片8位于遮光板7下方，所述的遮光板7前缘设有弧线，近光LED芯片6和远光LED芯片8发出的光束经由遮光板7前缘弧线成像；电路板9背面焊接有导热的紫铜块11，紫铜块11与灯壳体1尾部间形成一个密封腔体12，密封腔体12上连接有散热装置。
其中，所述的散热装置包括冷却液循环水管10和循环水管14，灯壳体1上设置有与密封腔体12相连通的冷却液循环水管10和循环水管14，冷却液循环水管10和循环水管14外部接水泵和散热水箱。
具体的，所述的LED单元体底部中间为LED单元体的发热体部分15，发热体部分15两边均设有电极16，发热体部分15通过焊接面17直接焊接在紫铜块11的凸台上，紫铜块11凸台镶嵌在电路板9上，电极16则与电路板9焊接，紫铜块11背面与密封腔体12中的循环冷却水接触。
本发明的工作原理：
LED发出的光束经由遮光板7前缘弧线成像，由第一凸透镜2和第二凸透镜3组合会聚LED光束，焦点位于大灯前方5米以外，得到明显的输出切线光型，三者之间组成一套高效率的光学会聚系统，近光LED芯片6位于遮光板7上方，远光LED芯片8位于遮光板7下方，通过遮光板前沿的弧线完成光会聚。第一凸透镜2固定于调焦环13上，可以微调焦距，第二凸透镜3固定在支架4上，通过支柱5安装与灯壳底部，支柱5的长度决定了后焦距的距离，遮光板、LED芯片、导热的紫铜块一同焊接在电路板9上，再固定于灯壳1底部，紫铜块11与灯壳1尾部形成一个密封腔体12，冷却液通过冷却液循环水管10进入，循环水管14输出，外部接循环水泵和散热水箱，完成循环散热。
有了很低热阻的保障，才能使得LED芯片发挥出应有的光效，因此LED发出的热量主要是通过LED芯片背面的中间部位传导出去的，紫铜块背后直接和循环冷却水接触，这样就把LED芯片的热阻降到了最低，比目前的铜基板和铝基板热阻还要低很多。
通过装车测试结果，本LED大灯光型和亮度均高过外国高端车型氙气大灯。
需要说明的是，上述描述中的透镜本身的类型参数指标性能不在限定范围。循环水泵和散热水箱以及冷却液不在限定范围内。LED单元体的种类形式性能品牌不在限定范围内。光输出折线形状依各国标准不同而异，不在限定范围。
本发明通过第一凸透镜与第二凸透镜组成双透镜组合直射汇聚光束，配合一个水平安置的遮光板成像，不仅使光会聚良好，也使得光效率进一步提高，同时还实现了双光(远近光)的组合。且由于双透镜组合直射光束会聚，因而减小了光损耗、提高了输出光强。同时，由于水平安置异型遮光板，因此得到了良好的光型折线，既不影响对方车辆安全，又使得驾驶者自己有良好的照明，巧妙的实现远近光切换，这对驾驶车辆和对面车辆会车尤为重要。此外，由于设置紫铜块导热结构，因此降低了LED芯片的热阻，提高了光效率。
以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (3)

1.一种LED车用大灯，其特征在于，包括灯壳体(1)、第一凸透镜(2)和第二凸透镜(3)；灯壳体(1)上设置有调焦环(13)，调焦环(13)上固定有第一凸透镜(2)，第二凸透镜(3)固定在支架(4)上，支架(4)通过支柱(5)安装于灯壳体(1)底部上，灯壳体(1)底部上固定有电路板(9)，电路板(9)背面焊接有导热的紫铜块(11)，紫铜块(11)与灯壳体(1)尾部间形成一个密封腔体(12)，密封腔体(12)上连接有散热装置，所述的电路板(9)正面上焊接有近光LED芯片(6)和远光LED芯片(8)，近光LED芯片(6)和远光LED芯片(8)之间水平设置有遮光板(7)，近光LED芯片(6)位于遮光板(7)上方，远光LED芯片(8)位于遮光板(7)下方；所述的遮光板(7)前缘设有弧线，近光LED芯片(6)和远光LED芯片(8)发出的光束经由遮光板(7)前缘弧线成像。
2.根据权利要求1所述的LED车用大灯，其特征在于，所述的散热装置包括冷却液循环水管(10)和循环水管(14)，灯壳体(1)上设置有与密封腔体(12)相连通的冷却液循环水管(10)和循环水管(14)，冷却液循环水管(10)和循环水管(14)外部接水泵和散热水箱。
3.根据权利要求1所述的LED车用大灯，其特征在于，所述的LED芯片底部中间为LED单元体的发热体部分(15)，发热体部分(15)两边均设有电极(16)，发热体部分(15)通过焊接面(17)直接焊接在紫铜块(11)的凸台上，紫铜块(11)凸台镶嵌在电路板(9)上，电极(16)则与电路板(9)焊接，紫铜块(11)背面与密封腔体(12)中的循环冷却水接触。
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