Abstract

The Adaptive Front-lighting System (AFS) is a part of the active safety system, providing optimized vision to the driver during night time and other poor-sight conditions of the road by automatic adaptation of lighting to environmental and traffic conditions. Basically, an AFS provides four different modes of the passing beam as designated in an United Nations Economic Commission for Europe regulation (ECE324-R123): neutral state or country light (Class C), urban light (Class V), highway light (Class E), and adverse weather light (Class W). In this paper, we first present an optics design for an AFS system capable of producing the Class C/V/E/W patterns requiring only on/off modulation of multi-array LEDs with no need for any additional mechanical components. The AFS optics consists of two separated modules, cutoff and spread; the cutoff module lights a narrow central area with high luminous intensity, satisfying the cutoff regulation, and the spread module forms a wide spread beam of low luminous intensity. Each module consists of two major parts; the first converts a discretely positioned LED array into a full-filled area emitting light source plane, and the second projects the light source plane to a 25 m away target plane. With the combination of these two optics modules, the four beam patterns are formed by simple on/off modulation of multi-array LEDs. Then we report the development of a prototype that was demonstrated to provide the four beam patterns.

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  1. B. D. ParkThe technology trend of automobile headlampTrans. KSAE2006288287
  2. B. Wördenweber, J. Wallaschek, P. Boyce, and D. D. HoffmanAutomotive lighting and human visionSpringerHeidelberg, German2007
  3. M. Götz and M. KleinkesHeadlamps for light based driver assistanceProc. SPIE2008700370032B
  4. T. TargosinskiAdaptive driving beam-new concept of vehicle front-lightJournal of KONES201017455458
  5. J. H. Yu, S. J. Ro, J. H. Lee, C. K. Hwang, and D. J. GoSmart headlamp optics design and analysis with multiarray LEDsKorean J. Opt. Photon.201324231235
  6. P. Dubal and J. D. NanawareDesign of adaptive headlights for automobilesInternational Journal on Recent and Innovation Trends in Computing and Communication (IJRITCC)2015315991603
  7. Hella Corporation2017www.hella.com
  8. Y. C. Liou and W.‐L. WangLighting design of headlamp for adaptive front‐lighting systemJ. Chin. Inst. Eng.200730411422
  9. United Nations Economic Commission for Europe (UNECE)ECE324-R123 Uniform provisions concerning the approval of adaptive front-lighting systems (AFS) for motor vehicles2013
  10. A. Cvetkovic, O. Dross, J. Chaves, P. Benítez, J. C. Miñano, and R. MohedanoEtendue-preserving mixing and projection optics for high-luminance LEDs, applied to automotive headlampsOpt. Express2006141301413020
  11. F. Chen, K. Wang, Z. Qin, D. Wu, X. Luo, and S. LiuDesign method of high-efficient LED headlamp lensOpt. Express2010182092620938
  12. Infineon2016http://www.infineon.com/cms/en/about-infineon/press/press-releases/2016/INFATV201610-001.html

Other (12)

B. D. ParkThe technology trend of automobile headlampTrans. KSAE2006288287

B. Wördenweber, J. Wallaschek, P. Boyce, and D. D. HoffmanAutomotive lighting and human visionSpringerHeidelberg, German2007

M. Götz and M. KleinkesHeadlamps for light based driver assistanceProc. SPIE2008700370032B

T. TargosinskiAdaptive driving beam-new concept of vehicle front-lightJournal of KONES201017455458

J. H. Yu, S. J. Ro, J. H. Lee, C. K. Hwang, and D. J. GoSmart headlamp optics design and analysis with multiarray LEDsKorean J. Opt. Photon.201324231235

P. Dubal and J. D. NanawareDesign of adaptive headlights for automobilesInternational Journal on Recent and Innovation Trends in Computing and Communication (IJRITCC)2015315991603

Hella Corporation2017www.hella.com

Y. C. Liou and W.‐L. WangLighting design of headlamp for adaptive front‐lighting systemJ. Chin. Inst. Eng.200730411422

United Nations Economic Commission for Europe (UNECE)ECE324-R123 Uniform provisions concerning the approval of adaptive front-lighting systems (AFS) for motor vehicles2013

A. Cvetkovic, O. Dross, J. Chaves, P. Benítez, J. C. Miñano, and R. MohedanoEtendue-preserving mixing and projection optics for high-luminance LEDs, applied to automotive headlampsOpt. Express2006141301413020

F. Chen, K. Wang, Z. Qin, D. Wu, X. Luo, and S. LiuDesign method of high-efficient LED headlamp lensOpt. Express2010182092620938

Infineon2016http://www.infineon.com/cms/en/about-infineon/press/press-releases/2016/INFATV201610-001.html

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