中国国际汽车照明论坛(IFAL)

2025 IFAL
2025 IFAL 参会回执 Registration Form
3.2MB下载
2025 IFAL 邀请函 Invitation
2.72MB下载
2025 IFAL 摘要模板 Abstract Template
32.0KB下载
2025 IFAL 论文模板 Paper Template
182.5KB下载
2025 IFAL 版权转让同意书 Copyright Transfer Agreement
19.17KB下载

Optical concepts for a combined low-beam and high-beam out of a single LED

Tobias Schmid1, PeterBrick1

1OSRAM Opto Semiconductors GmbH, Regensburg,Germany

Abstract:Inthepast,manyautomotivelightingfunctionshavebeenrealizedbydesignsthatstaticallyprovide specific illumination patterns. In contrast, existing adaptive designscomprise eithermoving shutters orelectronically-complex matrixsources.

Inthisarticle,weexplorealternativeoptionsforacombinedlow-beamandhigh-beamoutofasingleLED.

In order to reduce the electronic complexityand at the same time to come up with a compact LED forthe light source we resort to two rows of chips arranged on acommon carrier. The two rows canbe independentlydriven.

Adjacentprimaryopticscollectstheemissionofthetwoclosely-spacedchiprowsandsimultaneouslyprovides a way to separate respective contributions. The subsequent secondaryoptics is basedonconventional reflector/projectorconfigurations to realize low-beam and high-beamdistributions.

Insuchsystems,efficiency,tolerances,andsystemsizeareevaluatedwithrespecttodifferentprimary optics based on refraction,reflection andTIR.

Keywords: LED,optics, forward lighting, low-beam,high-beam.