Micro pixel LEDs: Design challenge and implementation for high-resolution headlamps

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dc.identifier.uri http://dx.doi.org/10.15488/10268
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/10341
dc.contributor.author Held, Marcel Philipp
dc.contributor.author Kloppenburg, Gerolf
dc.contributor.author Lachmayer, Roland
dc.date.accessioned 2020-12-08T15:27:05Z
dc.date.available 2020-12-08T15:27:05Z
dc.date.issued 2019
dc.identifier.citation Held, M.P.; Kloppenburg, G.; Lachmayer, R.: Micro pixel LEDs: Design challenge and implementation for high-resolution headlamps. In: Proceedings of SPIE 10940 (2019), 109401U. DOI: https://doi.org/10.1117/12.2509336
dc.description.abstract High-resolution vehicle headlamps represent a future-oriented technology that can be used to increase traffic safety and driving comfort. Typically, selective absorbing of light using a spatial modulator like DMD, LCD or LCoS creates the light distribution of such headlamp systems. A similar effect can be generated by using LED arrays. Its additive principle generates light only in specific segments if necessary. In general, these arrays can be distinguished between conventional LEDs arranged in an array and micro pixel LEDs. Conventional LED arrays characterize by the design (THT or SMD) with typically a few millimeters edge length. In contrast, a micro-pixel LED uses COB technology, in which individual LED dies are packed in a single housing directly next to each other at a distance of a few microns. By increasing the array resolution, the challenges in designing an optical system for high-resolution headlamps rise. High efficiencies and contrasts call for small, accurate lens geometries and negligibly scattered light effects. Due to limited installation space and manufacturing tolerances, compromises have to be made. Ideally, the optics have to be accurate enough to image each pixel of the micro LED with high contrasts and high efficiency and still be too blurry to project the gaps between each pixel. This results in small distances between LED and optics and therefore in diffcult to manufacture radii of curvature. In this paper we specify the challenges to implement micro pixel LEDs in headlamp systems, as well as present the controllability of scattered light effects of these systems. © COPYRIGHT SPIE eng
dc.language.iso eng
dc.publisher Bellingham : SPIE
dc.relation.ispartofseries Proceedings of SPIE 10940 (2019)
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject AFS eng
dc.subject AFS/ADB eng
dc.subject Automotive Lighting eng
dc.subject High-resolution headlamps eng
dc.subject Imaging optics eng
dc.subject Micro Pixel LED eng
dc.subject Monolithic LED eng
dc.subject Pixel light system eng
dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger
dc.title Micro pixel LEDs: Design challenge and implementation for high-resolution headlamps eng
dc.type conferenceObject
dc.type article
dc.type Text
dc.relation.doi https://doi.org/10.1117/12.2509336
dc.bibliographicCitation.volume 10940
dc.bibliographicCitation.firstPage 109401U
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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