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

Download statistics - Document (COUNTER):

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

Repository version

To cite the version in the repository, please use this identifier: https://doi.org/10.15488/10268

Selected time period:

year: 
month: 

Sum total of downloads: 116




Thumbnail
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
License of this version: 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.
Document Type: conferenceObject
Publishing status: publishedVersion
Issue Date: 2019
Appears in Collections:Fakultät für Maschinenbau

distribution of downloads over the selected time period:

downloads by country:

pos. country downloads
total perc.
1 image of flag of Germany Germany 68 58.62%
2 image of flag of Korea, Republic of Korea, Republic of 10 8.62%
3 image of flag of China China 9 7.76%
4 image of flag of United States United States 5 4.31%
5 image of flag of Russian Federation Russian Federation 3 2.59%
6 image of flag of Japan Japan 3 2.59%
7 image of flag of Hong Kong Hong Kong 3 2.59%
8 image of flag of United Kingdom United Kingdom 3 2.59%
9 image of flag of India India 2 1.72%
10 image of flag of France France 2 1.72%
    other countries 8 6.90%

Further download figures and rankings:


Hinweis

Zur Erhebung der Downloadstatistiken kommen entsprechend dem „COUNTER Code of Practice for e-Resources“ international anerkannte Regeln und Normen zur Anwendung. COUNTER ist eine internationale Non-Profit-Organisation, in der Bibliotheksverbände, Datenbankanbieter und Verlage gemeinsam an Standards zur Erhebung, Speicherung und Verarbeitung von Nutzungsdaten elektronischer Ressourcen arbeiten, welche so Objektivität und Vergleichbarkeit gewährleisten sollen. Es werden hierbei ausschließlich Zugriffe auf die entsprechenden Volltexte ausgewertet, keine Aufrufe der Website an sich.

Search the repository


Browse